How can I be sure of oral finasterides long-term safety?
A. You cannot be certain, because finasteride has only been in widespread use for less than two decades. But, fortunately, there is a naturally occurring control group. There are people who have a congenital 5 alpha-reductase deficiency and they’re perfectly normal adults, except they always have a great head of hair; their prostate does not enlarge; and their incidence of prostate cancer is close to non existent.
