Yam mucus and polysaccharide can stimulate and regulate the human immune system, reduce blood sugar and enhance human resistance. The results show that yam has certain anti diabetic effects, which may increase  secretion and improve damaged islets. β Cell function. It was found that there was a certain correlation between the anti free radical activity of Huaishan medicine and the content of polyphenolic components in the extract. The study also found that yam saponins have strong ability to scavenge hydroxyl from chemicalbook: they have strong Fe3 + reduction ability, which also increases with the increase of concentration, but not as good as the reduction ability of vitamin C at the same concentration.

Application
It is fit for dyeing or complementary color of wine, soda pop, fruit drink, jam, candy and so on.
It is fit for dyeing or complementary color of lipstick, shampoo ,rouge in cosmetics industry.
It can take place of chemosynthetic pigment and produce colourful drugs in.

Function
1.Antioxidation, antimutation and liver protection.
2.Strengthen body physiques.
3.Lose weight and fit, and even anticancer.
4.It is becoming the optimum food owning to its non-pollution, green and organism characteristics.
5.Purple Potato embody affluent nutrition of Selenium and anthocyanidin.