The purpose of this study is to investigate the pharmacokinetic properties of icariin, an active ingredient in the over-the-counter supplement, Horny Goat Weed.
Healthy volunteers will be randomly assigned to a 5 day course of icariin at 100 mg/day, 200 mg/day, 400 mg/day, or 800 mg/day, or a matching placebo.
24 hours of blood samples will be drawn for pharmacokinetic analysis. Side effects will be assessed for the full 5 days.
