Q: If I’m 20 years old and haven’t lost any hair yet, should I start using a laser comb now?

A: One should not treat hair loss until it actually occurs.

That said, once there is clear evidence that if a person is thinning, non-surgical treatments are best started early to prevent further hair loss.

It is important to keep in mind that finasteride (Propecia) is still the most effective treatment for early hair loss and has a good record for at least some long-term effectiveness. It is not clear what additional benefit the laser-comb will have.