Iron stick yam has traces like rust, hence its name. Iron stick yam is a precious Chinese herbal medicine, which has been highly praised by doctors in past dynasties as a longevity factor and a good medicine and food for both medicine and food. As a traditional Chinese medicine, it can be made into various pills and iron stick yam protection products for people to eat. As a food vegetable, it is delicate, smooth and unique, such as shredded yam, jujube paste yam and so on. Iron stick yam contains saponins, mucilage, choline, diosgenin, starch, glycoprotein, free amino acids, polyphenol oxidase, vitamin C, iodine, 16 kinds of amino acids, and many trace elements such as selenium, iron, copper, zinc, manganese and calcium.

Chinese yam is sweet in taste, flat in nature, non-toxic, has the functions of invigorating spleen, tonifying lung, strengthening kidney, nourishing brain, nourishing essence and beautifying face, resisting aging, resisting tumor, resisting fatigue, resisting the stimulation of harmful substances, regulating metabolism, enhancing immune function, promoting growth, regulating endocrine, regulating cardiopulmonary function, exciting blood-making system and regulating nervous system.