Black potato: Black potato is a kind of colorful potato with nutrition, health care and appreciation. This variety is short and precocious, with the same potato shape as ordinary potato, but deep purple inside and outside, and its melanin content is higher than that of ordinary black food. Melanin is rich in anti-cancer substance anthocyanin, which makes black potato a pioneer food for anti-cancer, and has the health care functions of preventing and treating cardiovascular and cerebrovascular diseases, resisting aging, beauty beauty and improving human immunity.