12 natural remedies for erectile dysfunction (impotence)

Remedy (click for Amazon user reviews)
Side effects
an amino acid or protein building block

a plant that grows in Asia

a molecule found naturally in the body

a fruit-bearing deciduous shrub

a naturally-occuring hormone found in the human body

the name of a product derived from the bark of the Pinus pinaster tree

a deciduous shrub native to China

a herb that originates in North America

a non-flowering tree with distinctive fan-shaped leaves

prepared from the inner bark of an Asian evergreen tree

an African evergreen tree

a commonly found metal