Horny Goat Weed AKA Epimedium has been used for thousands of years to treat a variety of issues including osteoporosis, high blood pressure, chronic fatigue and most famously for erectile dysfunction. The active ingredient is icariin, which inhibits the activity of the PDE5 that’s blocking dilation of the arteries in the penis. This allows blood to flow and create an erection. The prescription medication sildenafil (Viagara) works in much the same way.
Read up before taking this herb, it can make your heart race! https://www.healthline.com/health/erectile-dysfunc...