Remember also this study is on the frontal bald scalp of the monkeys. Finasteride has been notoriously poor at preserving frontal hair vis-a-vis hair on the vertex. Anyway, the point Bryan made is valid -- we simply don't know enough about hair loss to make large generalizations. But we do know that the pseudohermaphrodites from the Dominican Republic do not go bald and they lack the 5-AR II isozyme. They have normal levels of testosterone after puberty.
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