What do studies reveal on men over 35 who take Finasteride for hair loss?

"By the end of the first year, men taking Propecia had an average of 126 more hairs than men taking placebo. This difference continued to grow, and, by the end of the fifth year, the net difference between the groups increased to 277 hairs in favor of the men taking Propecia. At the end of the fifth year, 65 percent of men taking Propecia (n=219) maintained or improved their hair count compared to their hair count at the start of the studies, while all of the men on placebo (n=15) lost hair count."

Finasteride works by blocking the production of a hormone in the scalp that inhibits hair growth. Finasteride is indicated for men with male pattern hair loss. Please see an expert for hair loss evaluation. Best, Dr. Emer

Thank you for the question. Finasteride works great in combatting hairloss at any age, as long as the patient has fully matured and grown. Levels of DHT and testosterone become less in our body typically as we age, but if the patient is undergoing miniaturization of the hair-follicle from Male Pattern Baldness, then 1mg Finasteride should help the patient. Hope this helps.

There is not specific study that only looked at this age group.  What we know is that finasteride could be used at any age after patient's external genitalia is matured.  

As men get older, their testosterone becomes lower and therefore, their DHT is often lower. Finasteride works by blocking DHT, so if the DHT is lower, there is less an effect by this drug if a man's testosterine is lower.  In men in their 20s, testosterone is usually high therefore DHT is higher and the drug is more effective in blocking the genetic hair loss problems seen with DHT