What is a Chinese yam?

Chinese yam, known to some as cinnamon vine, is an ornamental vine that is native to Asia. The plant grows in parts of North America as well, but it is not related to the American yam or sweet potato.

The plant is used as a natural treatment for ailments of the lungs, kidneys, stomach and spleen. Chinese yam is also a natural remedy for diabetes management and asthma. Though both the tuber and bulbs of Chinese yam can be healthily consumed, the tuber, in general, is the only part that's eaten.

Diosgenin, a chemical substance used to make laboratory versions of estrogen and progesterone, can be found in the roots of Chinese yam. However, in its original state, Chinese yam doesn't contain hormones.