Q: Why do some people have a full head of hair into their seventies or eighties and others start to go bald in their late teens or early twenties?
A: The difference is genetic with the inheritance coming from either side of the family.
Although a person will have the genes his/her whole life, a gene’s expression (also called phenotype) can be quite variable. The factors that cause this variability is still unknown.
Topic: Hair LossTags: Age / Family History / Genes / Genetic Hair Loss / Genetics / Hair Loss / Phenotype
Posted by Robert M. Bernstein M.D. at 6:26 am
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