Q: What’s your honest take on Nutrafol? It is a product my dermatologist has recommended for my hair loss. — N.S. ~ New York, N.Y.
A: The traditional thinking is that that male pattern alopecia (androgenetic alopecia) is due to follicular sensitivity to DHT causing miniaturization and eventual loss of hair. The premise of Nutrafol is that hair loss is multi-factorial with an important inflammatory component and that it is important to address the inflammation as well as the DHT sensitivity.
This is a relatively new and important concept (I would like to stress this point!). However, the big leap is their conclusion: Since hair loss is multi-factorial, then broad, rather than targeted treatments would be most beneficial, and since naturally occurring “phytochemicals” are broader in action than targeted, FDA approved drugs (like and minoxidil), they should offer benefit in the treatment of hair loss and Nutrafol is the elixir that can accomplish this.
Although this makes sense in concept, there is no scientific evidence that Nutrafol can actually reverse or/mitigate androgenetic alopecia or any other type of hair loss. We need independent, blinded, controlled studies to show that Nutrafol actually works. Until then, it is very difficult to recommend this product and, more importantly, to recommend it over other treatments known to be effective.
Q: I had a good friend get a transplant at your practice and it seems that your practice is the industry leader in hair transplantation. I may one day be looking for one. That being said, my friend said I shouldn’t trust anyone else. I wanted to know if you may be able to tell me what tests/specific labs you have your patients do prior to starting Propecia. I am having my doctor put me on it but he does not recommend any labs but I don’t trust this. So I’m not looking for medical advice, just what your practice may advise a patient to get (in terms of labs/blood tests) prior to starting Propecia. I’m really hoping you can help as I have already contacted a number of other sources and can’t seem to get an answer. — M.B. ~ Upper East Side, N.Y.
A: Blood tests are not required before starting finasteride and we do not routinely perform them. If a patient requests test then Total and Free Testosterone, DHT, and Prolactin are reasonable to obtain, but there is no consensus on what the appropriate tests might be. If a patient requests tests because he has symptoms (i.e. such as lack of energy associated with low T), he should see his internist, urologist, or GP. That said, patients 50 and over (40 and over in patients with a high risk of developing prostate cancer) should have a PSA before starting finasteride.
Q: Does finasteride need to be taken every day? — M.B., Atlanta, GA
A:Finasteride (Propecia) is a competitive inhibitor of Type II, 5 alpha-reductase (5AR is the enzyme that converts Testosterone to DHT which then causes hair to miniaturize and eventually be lost). Finasteride is 100x times more selective in inhibiting the Type II enzyme (present in hair follicles) than the Type I enzyme (present in other body tissues). The turnover (T1/2) of the finasteride/5AR Type II complex is 30 days and the finasteride/5AR Type I complex is 15 days. This explains why finasteride does not need to be taken every day and why, after stopping finasteride, the effects may take a month or longer to begin to disappear.
Q: I recently visited my dermatologist regarding my hair loss, and after checking my hair he said I am showing signs of Androgenetic Alopecia (common baldness), and said if I don’t treat it, it will progress. From my research on the net, I figured he will put me on Propecia. In fact he put me on Avodart. When I told him it is not FDA-approved for hair loss, and Propecia is, he said Avodart is better and brings DHT down more, and Propecia is nothing next to Avodart. He told me to take it every day for 2 weeks, then every other day from then on as it has a long half life. From researching on the net, many hair restoration doctors rarely prescribe Avodart for hair loss due to some dangers. What is your opinion on this? — T.G., Darien, Connecticut
A: Although dutasteride (Avodart) can be more effective for male pattern hair loss, I would start with finasteride (Propecia) as many patients do great with it and the safety profile is better. The following are things I would consider before starting dutasteride:
As you point out, dutasteride is not FDA-approved for hair loss.
There is no data on its safety when used for hair loss. This is important since dutasteride has been only tested on an older population of patients (with prostate disease) rather than a younger population of patients needing medical treatment for androgenetic alopecia.
These is no natural model for dutasteride’s combined blockage of both type 1 and 2 5-alpha reductase (finasteride blocks only type 2 5-AR and there are families that have this deficiency and have no long-term problems. This, by the way, is how the drug was discovered).
The type 1 enzyme which dutasteride blocks is present in many more tissues of the body (including the brain) compared to type 2 (which is more localized to the skin).
Although so far unproven, there is a concern that finasteride may produce side effects than can be persistent after stopping the medication (post-finasteride syndrome). It this does turn out to be true, the effects from dutasteride would most likely be significantly more persistent.
If you start with finasteride and do have side effects, you will most surely have side effects from dutasteride; therefore, by taking finasteride first you will have avoided the potentially more problematic side effects from dutasteride
Q: What does the hair transplantation process do to your existing hair? — R.V., London, UK
A: When we perform hair transplant surgery, we transplant into an area that is either bald or has some existing hair. The hair that is existing is undergoing a process called miniaturization. What this means is that the hairs are continuing to decrease in size – both in diameter and in length. When we perform a hair transplant, we don’t transplant around the existing miniaturized hair on your scalp, we transplant through it. And the reason why we do that is because the miniaturized hair, the fine hair that is being affected by DHT, is eventually going to disappear, so you don’t want there to be any gaps.
So the question is, does the hair transplant actually destroy the existing hair? The answer is that it doesn’t destroy, but it can “shock” it. In other words, creating recipient sites (that the grafts are placed into) will temporarily alter the local circulation of the scalp and this can cause some of the hair in the area to be shed. The reason why hair may be shed is that hair is naturally cyclical. In other words, hair is normally growing, shedding, and then regrowing again. When you stress the scalp, the growing hair may be shed prematurely, but then it regrows.
If you think about the process of electrolysis, it makes sense that you don’t damage follicles from making recipient sites during a hair transplant procedure. In electrolysis used to treat unwanted hair, you stick a needle in the follicle, and you turn on an electric current. And you burn it. And then what happens to the hair? It usually comes back and you need to do it a few more times, even though we are applying an electric current via a needle placed directly in the follicle. So it makes sense that by just inserting a fine needle – the tool commonly used to make a hair transplant site – into the skin, one would not destroy hair follicles. However, the cumulative effect of making hundreds or thousands of recipient sites does shock the follicles and, as a result, some may shed their hair.
It can occur with general anesthesia – when the scalp is not even touched – and it can occur with oral medications, from pregnancy, or after psychological stress. So if you have hair restoration surgery and there is shedding, and it takes six months to a year for the transplanted hair to grow in, during this time hair transplant patient will experience some thinning. Since miniaturized hair is going to eventually disappear anyway, some of the miniaturized hair that is shed may not return. But if it is healthy hair, and it is shed, it will grow back. And, of course, the transplanted hair will be growing in as well during this time.
I am often asked to describe how much can be expected to be shed. The answer is that it is an amount that is often noticeable by the patient, but not noticeable by anyone else.
A:Saw Palmetto is a dwarf palm plant native to North America. The active ingredients can be found in the plant’s brown-black berries. It is proposed that it blocks the enzyme 5-alpha-reductase that converts testosterone to dihydrotestosterone (DHT). There is little scientific evidence that Saw Palmetto is actually effective for hair loss.
Q: Can using Kevis prevent hair loss? — H.T., New York, NY
A: Kevis has a line of natural products including shampoos, accelerators, lotions and conditioners claimed to treat hair loss by blocking DHT. The primarily ingredient is HUCP, or hyaluronic acid. Hyaluronic acid has not been shown to prevent hair loss.
Q: I use Nizoral for my dandruff. Does it work for hair loss too? — M.D., Danbury, CT
A: The active ingredient in Nizoral is Ketoconazole. This medication, originally developed to treat fungus infections, has slight anti-androgen action. It is supposed to work in hair loss by inhibiting the action of DHT on hair follicles. Although, in theory, it should be useful for androgenetic hair loss, there have not been conclusive scientific studies to show that it works to treat balding when used as a topical application for balding.
Q: I heard that the sexual side effects of Propecia are irreversible. Is this true? — L.R., Parsippany, NJ
A: The sexual side effects of finasteride (Propecia) begin to subside soon after the medication is discontinued. This would make sense since the drug finasteride is a reversible inhibitor of DHT. Although it is possible for side effects to be persistent after stopping the medication, this situation seems to be very uncommon and a cause and effect relationship is still in question.
One should consider that sexual dysfunction is relatively common in the adult male population and millions of patients take finasteride. Thus, there is a likely probability that some patients on finasteride may experience sexual dysfunction unrelated to the medication and, therefore, when the medication is stopped, the side effects would not be expected to go away.
Another thing to consider is that once a patient experiences sexual dysfunction (from a medication or another reason) psychological factors may come into play that make the side effects persist, even though they are unrelated to the medication or other underlying cause that may now be gone.
It is important to keep in mind that medication plays an important role in the prevention and treatment of androgenetic alopecia and decisions to use medications should be done thoughtfully and in an informed way. Blog postings can offer some subjective information, but they do not constitute true research and should be used in conjunction with the information provided by your physician and other informed sources.
Dr. Bernstein was interviewed by Dana Tyler, host of the television program “Eye on New York” on CBS, for the show that aired on April 17th. The wide-ranging interview was the feature in a 9-minute segment on hair transplantation and hair loss.
Below is a partial transcript from the interview.
Hair Loss – Men vs. Women:
DT: How big a problem is it, men versus women? We heard the statistics but is it worse for one group or the other?
RB: It seems to be worse in women emotionally. Statistically it’s obviously more common in men, but the pattern is very different. When men lose their hair they lose it mostly in the front. And they can start in two different patterns. One is in the temples and in the crown or it can just go front to back. That’s called patterned hair loss and it’s pretty obvious. Women have a more diffuse pattern so it would be many years before you even notice it.
DT: What about the influence we hear, if it’s your mother’s father or your mother’s grandfather was bald then therefore, men, you will be. Is there any truth to that?
RB: Like many myths there is a little bit to it. There is a slight predominance coming from the mother’s side of the family. There is something called an androgen receptor gene, that has been found on the X chromosome, which accounts for the slight difference between inheritance from the mother’s side versus the father’s side. But most of the genetics is on the regular chromosomes, called the autosomal chromosomes, which is the same from both sides. So you can get it from either your mother or your father or your uncles or grandparents.
Early Hair Loss:
DT: Age-wise. Are there certain times – I mean, we talked about earlier in the 30s, but some young men it happens earlier.
RB: It seems that when people start to lose their hair early, it has a tendency to be much more severe. So the people who start to thin around 16, 17 usually become very bald. Time is usually on your side if you have hair into your 30s and 40s, [it’s] more likely you’ll have a full head of hair.
Hair Loss in Women:
DT: Speaking about women and the reasons behind women’s hair loss. A little different than for men.
RB: It’s genetic, as with men for the most part, but there are two different systems. Where in men it’s related to androgens directly, which causes the front-to-back pattern, in women they have another enzyme pathway which kind of evens it out and keeps their hairline longer. Also, because women have a tendency to thin all over, their genetic hair loss can be mimicked by other things, such as diseases that cause hair shedding or thinning — so anemia, thyroid disease, medications such as birth control pills — all those things can also contribute to hair loss, and it seems that those factors are much more common in women than in men.
DT: And then in trying to determine if a woman is going through that, because there are more factors is it hard to figure out why there is the hair loss?
RB: It’s a little bit more difficult [in women]. The main thing that you do is to look at the hair diameters. In genetic hair loss the hairs have different diameters. In [conditions] like anemia, or where there is shedding on medication, the hair comes out at its root. Where people think of hair loss as losing hair, most of hair loss is thinning because the hairs are actually thinner in diameter.
Preventing Hair Loss:
DT: Preventing baldness… is there anything that can be done?
RB: There are… But it’s not what you think. It’s not hats and combs.
DT: Fertilizing your head. (laughs)
RB: There are two medications, main medicines. One is Propecia, or the generic term is called finasteride, and what that does is it blocks DHT. And DHT is what causes these hair follicles to gradually miniaturize, or get smaller, and disappear. And the other is Rogaine, which actually stimulates hair follicles directly. Unfortunately, Propecia can’t be used in women because it can cause birth defects during child bearing years and it can also stimulate breast tissue, but it is very effective in men.
DT: So what does a woman do?
RB: Well, Rogaine will help a little bit. Lasers can help a little bit, perhaps not as much as the initial studies have suggested. And then, once you’ve lost your hair, surgical options are available.
Hair Transplantation:
DT: Hair transplants. I know that’s a complicated procedure. And Dr. Max [Gomez] was talking about the art of it, too, when you’re finding someone. Tell me a little bit more…
RB: The main thing in hair transplants is really to determine who is a good candidate. And the interesting thing is that because of the pattern of [hair loss] in men, men usually have a very permanent area on the back and sides of the scalp. So when you move that to the front and top, it will continue to grow. Because women’s hair loss is more diffuse, the back and sides are not always stable. So, when you’re trying to decide if a woman is a good candidate, you have to make sure that the hair, where you get it from, is going to last their lifetime. And only a small percentage of women are really good candidates for that transplant.
The Future of Hair Restoration – Medications & Cloning:
DT: What about the future? Are you optimistic about new options on the horizon?
RB: First of all, new medications are coming out. Latisse is a medication that can grow eyelashes. And we’ve just started studying it in eyebrow hair, and it seems to grow eyebrows as well. There are studies to see if you can grow hair on the scalp. And it certainly will, it’s just whether it’s practical and how well it works. It probably will be of some benefit.
DT: There always is progress, right?
RB: Right. And then [there are] hair transplants where we can take individual follicles rather than having to take a long thin strip, although that still seems to give you the best volume. And then we’re trying to multiply hair. In other words, the limitation of transplants is always that we don’t have [as much] hair as we’d like. So we’re working on cloning. We’re working on multiplying hair that can actually be plucked from the scalp. So that [the original hair] will regenerate, and you then can get the plucked hair to grow into new hair follicles.
For more interviews with Dr. Bernstein, and other media appearances, visit our Bernstein Medical “In The News” section.
After trading anecdotes with fellow hair loss physicians about how finasteride can reduce body hair in some patients, Sharon A. Keene, M.D. took the next logical step and asked whether finasteride might have a negative effect on patients who have body hair transplant (BHT) procedures.
In a review of scientific literature on whether finasteride effects body hair growth, Dr. Keene finds that current research is inconclusive.
Finasteride, the drug in the hair loss medication Propecia, works by blocking the 5-alpha-reductase type 2 enzyme (5-AR Type 2) which is needed by the body to covert testosterone to DHT. DHT causes common baldness, by making hair follicles shrink and eventually die.
In looking at DHT’s effect on body hair growth, current research strongly suggests that it does play a key role. Males born with a deficiency of 5-AR Type 2, and thus no DHT, have reduced, or absent, body hair growth (and no loss of scalp hair).
It would seem logical then, that when finasteride is used to re-grow hair on the scalp, it would also inhibit the growth of hair on the body. However, the genetic variation among people is too great to determine exactly how much of an influence it plays.
With this uncertainty of DHT’s effects on body hair, it is impossible to say, without further study, if finasteride would have the same effect on body hairs which are transplanted to the scalp. In Dr. Keene’s conclusion, she suggests:
A patient on finasteride for at least a year who undergoes BHT is probably safe to continue it, as remaining body hairs are apparently not sensitive to the effects of this drug.
You can read the full discussion and review of current research in the January/February 2011 issue of Hair Transplant Forum International, the official newsletter of the International Society of Hair Restoration Surgery (ISHRS).
Q: I have been on finasteride for about 7 months. After my latest haircut I can see that my scalp is shiny. I read that is from sebum buildup and it can cause a layer that clogs the growth of hair. I was wondering if this is true and, if so, how can it be treated? — T.C., Philadelphia, PA
A: It is not true. Hair loss is caused by the miniaturizing effects of DHT on the hair follicle, not by blocked pores.
Q: I am currently taking Avodart and have done so for around 8 months. Last night I had a significant loss of hair after taking a shower, nothing like I have ever seen before and found it very distressing. Can you tell me if this is hair loss or could it be something known as shedding and could you please tell me what is the difference between hair loss and hair shedding? — M.S., New York, NY
A: Hair loss is a very general term that can refer loss of hair for any reason. Genetic hair loss is caused by the effects of DHT on hair follicles that result in miniaturization -– i.e. a slowly progressive change in hair diameter that starts with visible thinning and that may gradually end in complete baldness. Hair shedding is more sudden where hair falls out due to a rapid shift of hair from its growth phase into the resting phase. The medical term for this is telogen effluvium. This process is usually reversible when the offending problem is stopped. It can be due to stress, medication, or other issues. You should see a dermatologist to figure out which process is going on. Dutasteride can cause some shedding when it first starts to work, but it would be unusual to do this after being on treatment for eight months.
Q: I’m concerned that finasteride might result in unwanted body hair on the arms, back, etc. Is there any truth to this? My thinking is that since finasteride blocks the enzyme 5 alpha-reductase which converts testosterone to its more active form, DHT (dihydrotestosterone), is it possible that it might actually have some effectiveness in ameliorating unwanted hair? — P.P., Stamford, CT
A: Yes, finasteride does have some ability to decrease body hair, since growth of body hair is stimulated by DHT. However, the effects of finasteride are mild and not observed by everyone, so if you have unwanted body hair you will probably need some other means to remove it such as waxing, laser hair removal or electrolysis. The important thing is that finasteride doesn’t increase body hair.
Q: Is it recommended to wait for 1 year after starting Propecia, when the effect of the medication kicks in and improves density of donor area, and then perform the surgery? — Z.B., Bergen County, New Jersey
A: Propecia will not affect the donor area, as this area is generally not impacted by the miniaturizing (thinning) effects of DHT –- the hormone that Propecia blocks. The purpose of waiting the year is to possibly regrow hair in the recipient area. If regrowth is significant, a hair transplant may not be necessary. If a person’s hair loss is extensive and there is little chance that Propecia will grow a significant amount of hair back to give a satisfactory improvement, then waiting the year is unnecessary.
Q: What happens to hair diameter when you age? — K.L., Greenville NY
A: From infancy to puberty, hair gets progressively thicker. From adulthood to old age the hair becomes thinner again and this is exacerbated by the effects of DHT in susceptible persons. The later process is called androgenetic alopecia (common baldness) and is characterized by miniaturization – the progressive decrease in hair diameter and lengths as a result of DHT.
However, even without the effects of DHT, hair gradually thins over time in many people.
Q: I am currently 28. I have been taking Propecia for 6 years and recently began to grow sparse chest hair for the first time in my life. Is the Propecia causing these effects? — H.L., Gowanus, Brooklyn, NY
A: DHT causes male pattern baldness and stimulates the growth of body hair. The use of Finasteride, a DHT blocker, will permit scalp hair to grown and inhibit the growth of body hair, not stimulate it.
However, the effects on body hair are quite small, so your natural tendency to grow chest hair over time is probably not being blocked by the treatment.
Q: I know that Propecia works in only about half of patients. Are younger people more likely to be helped by this medication? — V.C. Greenpoint, Brooklyn
A: The main studies by Merck looked at men between the ages of 18 and 41. The five year data (which, in my view, is most important) showed that 48% of men had an increase in hair growth and 42% had no change over baseline. Thus a full 90% held on to their hair or had more over a 5-year period. This compares very favorably to the placebo group where 75% lost hair over the 5-year period.
I think the most interesting question relates to the 10% who continued to lose hair in the treated group. Did these men lose hair at a slower rate than the non-treated group? Based on the action of finasteride on blocking DHT and DHT’s central role in causing male pattern hair loss, it is reasonable to assume that even these “non-responders” did have some benefit from the drug, albeit small. If half of those on the medication who continued to lose hair did so at a rate slower than the placebo group, then 95% of patients actually benefited from the medication to some degree – an extraordinarily high success rate, in my opinion.
Q: Why does a hair transplant grow – why doesn’t the transplanted hair fall out? — J.F., Redding, C.T.
A: Hair transplants work because hair removed from the permanent zone in the back and sides of the scalp continues to grow when transplanted to the balding area in the front or top of one’s head. The reason is that the genetic predisposition for hair to fall out resides in the hair follicle itself, rather than in the scalp — this idea is called Donor Dominance. This predisposition is an inherited sensitivity to the effects of DHT, which causes affected hair to decrease in diameter and in length and eventually disappear — a process called “miniaturization.” When DHT resistant hair from the back of the scalp is transplanted to the top, it will continue to be resistant to DHT in its new location and grow normally.
Q: Hi! I wanted to ask if after hair restoration surgery the transplanted hair will eventually fall out? Because the surgery is to restore hair mainly for people with genetic hair loss which results from DHT, won’t the DHT make the new follicles implanted fall out as well? — B.C., Stamford, C.T.
A: Hair loss is due to the action of DHT (a byproduct of testosterone) on hair follicles that cause them to shrink and eventually disappear (the process is called miniaturization). The follicles on the back and sides of the scalp are not sensitive to DHT and therefore don’t bald (miniaturize).
When you transplant hair from the back and sides to the bald area on the front or top of the scalp the hair follicles maintain their original characteristics (their resistance to DHT) and therefore they will continue to grow.
Q: Are there DHT blockers that are sold in the pharmacy over the counter? — C.C., — Fairfield County, Connecticut
A: The only effective DHT blockers are finasteride (Propecia, Proscar) and dutasteride (Avodart).
These medications require a doctor’s prescription and are not sold OTC. Nizoral is a topical shampoo for seborrhea (a type of dandruff) that is sold over the counter, but it is not effective in treating hair loss.
Q: My son, 25 years old, is seeing hair loss around the hairline. According to your website, he is probably a stage II. He may have a little hair loss at the vertex; right now it is hard to tell. He is very muscular and loves weight lifting, but no drug enhancement. Is there a relationship between weight lifting and hair loss, since I have read that weight lifting increases testosterone levels? — G.S., Pleasantville, NY
A: Yes, weight lifting does increase testosterone, which in turn increases DHT. This can accelerate hair loss, although the effect is generally very slight.
Rather than modify his exercise program, your son may want to consider taking finasteride (Propecia). This requires a doctor’s prescription.
Q: I heard that there is a new drug on the market called Avodart for prostate enlargement which might help with hair loss as it blocks the conversion of testosterone to DHT better than Finasteride and is more effective than Propecia. Do you recommend taking it and if so what is the dose? — Y.B., Orlando, Florida
A: I am currently not recommending that patients take Dutasteride for hair loss, although it is more effective than Propecia, finasteride 1mg. (Dutasteride 0.5, the dose generally used for hair loss, seems to be slightly more effective than finasteride 5m in reversing miniaturization.)
The reasons that I am hesitant to prescribe it at present are outlined in the Hair Restoration Answers question, “Is Avodart Safe?”
In addition to the reasons that I listed in that response, I would also consider that: Dutasteride, unlike finasteride, decreases sperm counts, it can result in persistent decreased sex drive and the incidence is greater than with finasteride. Finally there are a significant number of alpha-type 1 receptors in brain, those affected by dutasteride, but not finasteride.
However, since Dutasteride is approved for older men with prostatic disease, using it for hair loss in this age group (usually in a lower dose) is reasonable.
Q: I am a 21 yrs old male having serious hair loss over the last few years. I also have very little facial hair. Since Propecia is a DHT blocker can it inhibit beard growth? — E.M., Astoria, N.Y.
A: As you suggest, it would be reasonable to assume that since DHT stimulates beard growth, blocking DHT (with finasteride) would tend to inhibit its growth. In practice, this does not seem to be the case, i.e. we don’t find that Propecia has any effect on facial hair. The reason is not clear.
It is interesting to note that testosterone stimulates growth of axillary and pubic hair, but not scalp hair. Scalp hair growth is not androgen dependent, only scalp hair loss is.
DHT stimulates terminal hair growth of the beard, trunk and limbs, external ears and nostrils. Of course, it also is responsible for the bitemporal reshaping of hairline as one passes into adulthood and causes male patterned baldness (androgenetic alopecia).
Q: I have read that in the evaluation of a patient for hair restoration surgery some doctors use a densitometer to measure miniaturization – the decrease in size of hair diameters. I read that miniaturization is a sign of genetic hair loss, but when there is miniaturization of greater than 20% in the donor area, a person may not be a good candidate for hair transplants. Is this correct and does 20% miniaturization mean that 20% of the population of terminal hairs have become fine vellus-like hairs or that there is a 20% decrease in the actual diameter of each of the terminal hairs? — B.A., New Albany, Ohio
A:Miniaturization is the decrease in hair shaft length and diameter that results from the action of DHT on healthy, full thickness terminal hairs. The hairs eventually become so small that they resemble the fine, vellus hair normally present in small numbers on the scalp and body. Miniaturized hairs have little cosmetic value. Eventually miniaturized hairs will totally disappear. Twenty percent miniaturization refers to the observation, under densitometry, that 20% of the hairs in an area show some degree of decreased diameter.
In the evaluation of candidates for hair transplantation, we use the 20% as a rough guide to include all hairs that are not full thickness terminal hairs. Of course we are most interested in the presence of intermediate diameter hairs — i.e. those whose diameters are somewhere between terminal and vellus and are clearly the result of DHT. I don’t know if one can tell the difference on densitometry between vellus hairs, fully miniaturized hairs and senile alopecia. The partially miniaturized population is most revealing.
Miniaturization in the recipient scalp (i.e. the balding areas on the front top and crown that we perform hair transplants into) is present in everyone with androgenetic hair loss. Miniaturization in the donor area, however, is less common (in men). It means that the donor area is not stable and will not be permanent. Men with more than 20% of the hair in the donor area showing miniaturization are generally not good candidates for hair transplant surgery.
Q: The makers of the HairMax LaserComb have claimed that it will “revolutionize the hair growth industry.” What do you think?
A: This claim is obviously overstated.
Since the Low Level Laser Therapy (LLLT) doesn’t affect the action of DHT on hair follicles, it doesn’t affect the underlying cause of genetic hair loss, and thus would be expected only to have limited effectiveness. The company’s own studies show that this is, indeed, the case.
It was also predicted that Rogaine would revolutionize the field of hair restoration and it had little impact.
In my opinion, only finasteride has made a significant impact on the long-term course of hair loss, particularly in its ability to postpone the need for surgical intervention such as hair transplants.
Q: I’m 52 years old and have been taking Propecia (finasteride) for two years. It seems to maintain the status quo with no apparent regrowth. I am considering adding a dose of Avodart (dutasteride) once a week in conjunction with the daily Propecia. My question is twofold: (1) Since dutasteride blocks production of both enzymes (type I and II) that produce DHT from testosterone, is it redundant to take the finasteride that only blocks the type I enzyme? — Y.B., Orlando, Florida
A: It is redundant to take both.
However, you may not be taking the optimal dose of dutasteride which seems to be at least 0.5mg a day for hair loss.
Q: Will Propecia and Minoxidil reverse some of the miniaturization going on with someone with thinning hair? If I do need a hair transplant will I have to stay on these medications? — C.C., — Fairfield County, Connecticut
A: Yes, both minoxidil (Rogaine) and finasteride (Propecia, Proscar) affect the miniaturization of the hair follicles and help restore the shrunken follicles to cosmetically viable hair.
Minoxidil works by directly simulating miniaturized follicles to grow, whereas finasteride blocks DHT, the hormone that causes hair to miniaturize and eventually fall out.
Finasteride is much more effective than minoxidil in preventing or reversing the miniaturization process and it is so much more convenient to use that we generally suggest finasteride after a hair transplant procedure, but rarely recommend minoxidil.
Q: Some non-steroid athletic nutritional supplements claim to increase testosterone. Assuming they worked, would increasing testosterone increase DHT and hair loss?
A: Yes, if they were effective in increasing testosterone then they may accelerate hair loss.
Q: Why should a doctor measure miniaturization in the donor area before recommending a hair transplant? — E.B., Key West, F.L.
A: Normally, the donor area contains hairs of very uniform diameter (called terminal hairs). In androgenetic hair loss, the action of DHT causes some of these terminal hairs to decrease in diameter and in length until they eventually disappear (a process referred to as “miniaturization“). These changes are seen initially as thinning and eventually lead to complete baldness in the involved areas.
These changes affect the areas that normally bald in genetic hair loss, namely the front and top of the scalp and the crown. However, miniaturization can also affect the donor or permanent regions of the scalp (where the hair is taken from during a hair transplant). If the donor area shows thinning, particularly when a person is young, then a hair transplant will not be successful because the transplanted hair would continue to thin in the new area and eventually disappear. It is important to realize that just because hair is transplanted to another area, that doesn’t make it permanent – it must have been permanent in the area of the scalp it initially came from.
Unfortunately, in its early stages, miniaturization cannot be seen with the naked eye. To detect early miniaturization a doctor must use a densitometer, or an equivalent instrument, that magnifies the surface of the scalp at least 20-30 times. This enables the doctor to see early changes in the diameter of the hairs that are characteristic of miniaturization. If hairs of varying diameter are noted (besides the very fine vellous hairs that normally occur in the scalp), it means that the hair is being affected by DHT and the donor area is not truly permanent.
In this situation, a person should not be scheduled for hair transplantation. If the densitometry reading is not clear, i.e. the changes are subtle and the doctor is not sure, then the decision to have surgery should be postponed. By waiting a few years, it will be easier to tell if the donor area is stable. Having surgery when the donor area is miniaturizing can be a major problem for a patient, since not only will the transplanted hair eventually disappear, but the scar(s) in the donor may eventually become visible. This problem will occur with both follicular unit transplantation (FUT) and follicular unit extraction (FUE).
Q: Can stress accelerate hair loss? I am 25 and there is balding on my dad’s side of the family. I never had any thinning or hair loss till this year. I guess you can say I’ve been under a lot of stress. When I did notice shortly after my 25th birthday I started stressing even more, which led to more hair loss. It is thinner up front and it is thin on top. I have heard of some hair docs mapping your head for miniaturization, do you do this too? — E.W., Miami, FL
A: Yes. The presence of miniaturization (decreased hair diameter) in the areas of thinning allows us to distinguish between hair loss due to heredity (i.e. androgenetic alopecia) — in which hair progressively decreases in diameter under the influence of DHT — and other causes. The degree of miniaturization can be assessed using a hand-held instrument called a densitometer.
The pattern of hair loss and the family history are also important in the diagnosis.
Stress more commonly produces telogen effluvium, a generalized shedding that is not associated with miniaturization and is often reversible without treatment.
Q: My friend is taking Avodart, he bought it over the internet. Is it safe to take? — T.G., Denver, Colorado
A:Avodart (dutasteride 0.5mg) was approved by the FDA for the treatment of prostate enlargement in men in 2002. Avodart has not been approved for the treatment of androgenetic hair loss, although physicians can use an approved medication in ways other than for which it was specifically approved. That said, the use of dutasteride certainly requires a doctor’s supervision.
Like finasteride (the active ingredient in Proscar and Propecia), dutasteride blocks the enzyme 5-alpha reductase that converts testosterone to DHT (DHT is a key hormone that causes hair loss). However, unlike finasteride, which only inhibits the Type I form of the enzyme, dutasteride inhibits both the Type I and Type II forms. This combined effect lowers circulating DHT more with dutasteride than with finasteride, but also increases the incidence of its side effects.
The Type II form of the enzyme (blocked by finasteride) is found predominantly in the hair follicle. The Type I form of the enzyme has been found in the scalp and sebaceous glands, and many other parts of the body, but its exact role in hair growth has not been determined. It is felt that dutasteride’s ability to dramatically lower serum levels of DHT is what makes it a more potent medication in hair loss.
When considering the safety of dutasteride, one should consider the following:
It acts on other parts of the body besides the hair follicle.
Unlike finasteride, where families that had a deficiency of the Type II 5-alpha reductase enzyme were followed for years without any adverse effects, there is no natural biologic model to show the safety of dutasteride.
Dutasteride has been approved for prostate enlargement in an older male population. It is not approved for hair loss and, in fact, the clinical trials for hair loss were discontinued, so there is no safety data for its use in younger patients. There is a greater incidence of sexual side effects with dutasteride compared to finasteride.
The 1/2 life of dutasteride is 5 weeks compared to 6-8 hours for finasteride. Serum concentrations of dutasteride are detectable up to 4-6 months after discontinuation of treatment.
Q: Dr. Bernstein, I was reading about a densitometer on your website. What is it and what is it actually used for? — Z.A., Westchester, NY
A: The hair densitometer was introduced to hair restoration surgeons by Dr. Rassman in 1993. It is a small, portable, instrument that has a magnifying lens and an opening of 10mm2.
To use it, the doctor clips the hair short (~ 1-mm) and the instrument is then placed on the scalp. The doctor counts the total number of hairs in the field, looks at the number of hairs per follicular unit and assesses the diameter of the hair, looking in particular for abnormal levels of miniaturization (decreased hair shaft diameter caused by the effects of DHT).
The densitometer can increase the accuracy of the diagnosis of genetic hair loss by picking up early miniaturization.
It can also better assess a person’s donor hair supply, thus helping to determine which patients are candidates for a hair transplant.
Densitometry has helped us define the conditions of diffuse patterned and unpatterned hair loss (DPA and DUPA) and help to refine the diagnosis of hair loss in women.
Q Do Rogaine and Propecia work synergistically? — N.W., Chappaqua, N.Y.
A: They are synergistic, since the mechanisms of action are different.
Rogaine directly stimulates hair growth, while Propecia is permissive for hair growth by blocking DHT, the byproduct of testosterone that causes hair to miniaturize and eventually disappear.
The important thing to remember, however, is that for most people, Propecia is far more effective.
Q: I know that I am going to be bald because my father is bald and I am losing my hair just like him. What actually causes this kind of hair loss? — J.P., Paradise Valley, Arizona
A: Although there are many different causes, the overwhelming number of people that have hair loss have what is referred to as “patterned hair loss” or “androgenetic alopecia.”
In men, it is due to a hormone called DHT, which is a by-product of testosterone produced by the action of the enzyme 5-alpha reductase. This enzyme is inhibited by the hair loss medication Propecia. See the causes of hair loss in men page on the Bernstein Medical – Center for Hair Restoration website for more information.
In women, the mechanism is a little bit more complex as another enzyme, aromatase, is involved in the metabolic pathway. See the causes of hair loss in women page on the Bernstein Medical – Center for Hair Restoration website for more information.
We know that the inheritance comes from both the mother’s and father’s side, although the actual genes causing hair loss in men and women have not yet been identified. Statistically, the inheritance from the maternal side appears to be a bit stronger, but the reason for this is unknown.
Q: It is my understanding that as a person loses his or her hair, the skin of the scalp undergoes a number of changes, namely there is a loss of fat, an increase in cellular atrophy, and of course the dreaded perifollicular fibrosis (now that’s a mouthful). It seems to me that these changes, in particular the fibrotic scarring, are the main obstacles in the way of regrowth, and the reason Propecia does not work for extensively bald men. What can be done about this demon we call fibrosis? Can it be slowed, stopped, prevented, reversed? If we could somehow counteract collagen formation, wouldn’t our baldness problems be solved for good? If a bald scalp is atrophic, how does it have the capacity to hold a whole new head of transplanted hair? Is there a limitation to the number of hairs we can transplant (outside of donor limitations)? — R.L., Rivington, C.T.
A: The findings that you are describing are well documented; however, it is not clear if these changes are the cause of the hair loss or are the result of having lost one’s hair. Most likely, the DHT causes the hair follicles to miniaturize and eventually disappear. This, in turn, causes the scalp to thin and lose its abundant blood supply (whose purpose is to nourish the follicles). The changes in the scalp are also affected by normal aging, which causes alterations in connective tissue including the breakdown of collagen and other components of the skin. The changes seen with aging are greatly accelerated by chronic sun exposure.
Fortunately, even with long-standing baldness there is still enough blood supply to support a hair transplant, although there are some limitations. One should perform a hair transplant with a lower density of grafts when patients have thin, bald fibrotic scalps since the blood supply is diminished.
The most important factor, however, is photo change. The sun dramatically alters the connective tissue making the grafts less secure in their sites and alters the vasculature, (blood vessels) decreasing tissue perfusion (blood flow to the tissues). When there is bald atrophic, sun damaged scalp, I generally perform two hair transplant sessions of lower density (in place of one) spaced at least a year apart to give time for the scalp to heal and blood flow to increase in the area.
I often have the patient treated with topical 5-flurouracil before the surgery to improve the quality of the skin and to treat or prevent pre-cancerous growths from the sun.
Q: I have read on numerous websites that Propecia and Minoxidil work synergistically, and that a hair loss sufferer will see better results using them together than either one alone. Do you believe this is the case, or do you think Propecia is enough treatment by itself for someone who just began to experience slight hair thinning and is too early for hair transplantation? — K.V., Hewlett Bay Park, New York
A: They may act synergistically since their mechanisms of action are different.
Rogaine (Minoxidil) stimulates the hair follicle directly, but Propecia (Finasteride 1 mg) permits hair growth by blocking the negative effects of DHT. Of the two, Propecia is far more effective. It is reasonable to use the two together as long as the medications are used regularly.
For patients contemplating surgical hair restoration, we generally have them continue Propecia only, since applying Minoxidil is too fussy and offers only incremental benefit.
Q: Why does a hair transplant work? – L.L., Salem, Massachusetts
A:Hair transplantation works because hair taken from the permanent zone in the back and sides of the scalp maintains its original characteristics when transplanted to a new place in the balding area in the top of the head. This property of hair is called “donor dominance” and is the reason why hair transplants are possible.
The hair follicles in areas that go bald are genetically susceptible to DHT, a breakdown product of testosterone. In response to DHT, these hair follicles miniaturize (decrease in size) until they eventually disappear. When follicles from the permanent zone, that are resistant to the effects of DHT, are moved to a balding area, they maintain this property and continue to grow.
Dr. Bernstein was interviewed by New York Newsday in their article, “It’s a Hairy Decision Picking a Treatment for Baldness.” The complete article is below:
HEALTH MATTERS COLUMN
Even IF they don’t talk much about it, just about all the guys he knows are taking medication for their thinning hair, said Steve, a retail manager in his early 30s from Suffolk County, NY. He would be too, but he had side effects right away. He’s had consultations for hair transplants, but that won’t work either because of the pattern of his balding.
So he’s using a protein product that makes his hair look fuller, changed his diet to include leafy green vegetables, gone to two psychics for help. And, he said, he’s biding his time, waiting for new hair restoration medications or for hair cloning to hit the marketplace.
“In the ’90s, everything’s about looks,” said Steve, who asked that his last name be kept confidential. “No one wants to give up their youth.” All the effort to find a hair restoration solution is worth it, he said, “because losing my hair bothers me a lot.”
Sure, hair loss isn’t crippling or life-threatening. But to hear people’s tales, it’s traumatic, depressing and embarrassing.
Yet, you’re more likely to get a snicker than a hug for your pains, said Spencer Kobren, 34, a Manhattan consumer activist and author of “The Bald Truth,” (Pocket Books, 1998, $6.99.) There may be few open arms to comfort you, he said, but there are plenty of extended hands to take your trust and your money.
Kobren should know. He has spent several years testing out hair loss products and talking to the experts about his own hair loss, which began at 22. Now he serves as a sounding board and clearinghouse for the good news and the bad about hair loss and its treatments on a syndicated radio show, aired locally on WEVD /1050 AM on Sunday nights.
“You feel like you’re losing a part of yourself. You see your appearance deteriorate, often rapidly and drastically,” he said. You become vulnerable to promises and pitches, but don’t be swayed by them, said Kobren, who now has a full head of hair. Instead, do a lot of research. The wrong hair restoration products or treatments may not only fail to grow hair, they can make matters a lot worse. For example, he said he gets thousands of letters and e-mails about botched hair transplants that leave men scarred, poorer and balder.
According to Kobren, about $7 billion is spent by consumers annually on finding solutions to hair loss. There are about 50 million men who are balding, with at least 20 percent starting in their 20s. Most have male-pattern baldness, genetically linked and triggered by the action of a hormone called dihydrotestosterone (DHT).
Hair loss is not just a guy thing, though. Plenty of women — about 20 million — have varying degrees of it too. Hair loss is finally getting recognition as a women’s health problem, said Maggie Greenwood- Robinson, whose book, “Hair Savers for Women” (Three Rivers), is due next spring. Kobren’s “The Truth About Women’s Hair Loss,” (Contemporary) will be out in January. “There are more options than ever before for women with hair loss,” said Greenwood-Robinson, and they shouldn’t give up.
But they do have to be cautious. The diagnosis and treatment for men and women is very different, said Dr. Robert M. Bernstein, assistant professor of dermatology at Columbia College of Physicians arid Surgeons and medical director of the New Hair Institute in Manhattan and Fort Lee, N.J.
“Women usually have a diffuse type of hair loss with thinning all over,” he said, “while men generally lose hair on the front and top and keep a permanent zone on the back and sides.” Female baldness can also be due to DHT, but many women lose hair because of anemia, gynecological issues, thyroid disorders or stress, among other reasons. You don’t want to waste your efforts on hair restoration products when what you need is more iron or different birth control pills. “A medical evaluation is extremely important to rule out underlying medical conditions,” said Bernstein.
The treatment of hair loss is an increasingly complicated decision for both men arid women, but at least there is more information than ever to help you ask the right questions. Web sites include www. thebaldtruth.org and www.regrowth.com. Bernstein’s practice has a Web site at www. newhair.com and a detailed book called “The Patient’s Guide to Hair Restoration.”
Your hair restoration options include:
Medication: Finasteride (brand name Propecia), taken orally by prescription. Available for under two years, Propecia is for men only and causes side effects in about 2 percent of them. It has been shown to stop hair loss in about 87 percent of users and new growth in about half. It’s not for women, because it can cause birth defects if a woman is pregnant, and if she’s past child-bearing age, it doesn’t seem to work.
Minoxidil: (brand name Rogaine), used topically. It can be used by both men and women and appears to slow down the rate of hair loss, but not to prevent balding in the long haul. Any effect from either of these hair restoration medications stops when you no longer use them.
Hair transplant surgery: for men and women. Bernstein has pioneered a state-of-the-art technique called follicular unit transplantation, a precise method using hair-follicle groupings that result in a more natural growth of hair and doesn’t leave scars.
Removing grafts of skin from your head and placing them in balding spots is clearly an art as well as a science. Besides being a good candidate for surgical hair restoration, you need to find a dermatologist with a lot of experience performing hair transplant surgery. Expect to ask many questions, learn the risks, see pictures of other patients and meet them in person.
Even IF they don’t talk much about it, just about all the guys he knows are taking medication for their thinning hair, said Steve, a retail manager in his early 30s from Suffolk County, NY. He would be too, but he had side effects right away. He’s had consultations for hair transplants, but that won’t work either because of the pattern of his balding.
