• Ginko is a common herb from Asia that is widely used for erectile dysfunction. It enhances blood flow in the penis. It is said to work by relaxing the smooth muscles of the penis.

• Ashwagandha is another Asian herb that is used widely to increase strength and sexual function. The name Ashwagandha is an ancient Sanskrit word that roughly translates as 'the fragrance of horses'. It is also used as a health tonic.