... ISO9001 2.100% purple sweet potato 3.high purity,competitive price high-end health care product anthocyanidin powderPurple potato introduction Sweet ... varietal type. Purple potato, with rich nutrition and special health care function, contains around 20% protein, including 18 ... vitaminA ,phosphor, iron and anthocyanin of a lot of high medical value. At present, anthocyanin is mainly extracted from ...