Alan Webb's Hair wrote:
Is there any evidence finasteride affects athletic performance? I've seen the idea thrown out here in letsrun that Alan Webb's performances suffered as a result of finasteride. However finasteride was a banned substance because of its ability to mask steroids. If pro athletes were using finasteride with doping, it would go without saying that it probably had no negative effects on athletic performance
Do a search about the class action lawsuits, lingering negative side effects of dht blockers, finasteride, propecia. You would probably need to be doping to offset this drug...
If your a runner these negative side effects would have a greater chance affecting you. That's great if there are advocates with no side effects many of whom claim Fin. increases testosterone but it also increases estrogen abnormally increasing your body fat, feminizing etc.