Wild yam, commonly known as colic root or Mexican wild yam, is native to China and North America. Wild yam, whose botanical name is Dioscorea villosa, is a tuberous vine (and not a root, as it is normally thought) that grows in wet and humid regions. It can be found growing in thickets all over the world, where there is tropical, subtropical and temperate climate. 

Wild yam extract contains diosgenin, which has anti-fatigue, anti-inflammatory, anti-stress, hypocholesterolemic, and estrogenic effects.