This is not a herb but an amino acid and it helps increase the production of nitric oxide which helps you achieve rock hard or firmer erections. It is also called the Nature's Viagra. Foods that are rich in L-arginine include Oatmeal, Peanuts, Cashews,Walnuts, Dairy, Green Vegetables, Soybeans, Seeds and Chickpeas.
3) Fo-Ti
Fo-ti is also called he shou wu, which means "black-haired Mr. He" in Chinese. This name refers to a legend of an older villager named Mr.