... Anthocyanins can be red, blue or purple depending on the source's chemical structure, and are also found in foods such ... been associated with a reduced cancer risk in epidemiology studies.Source: Purple sweet potatoAppearance: Purple fine powderSize: 80 meshCharacteristic: ... metal ions.Application: It can be widely used in the noodles, the steamed bun, the candy, Kentuckey, Macdonald, fast food, etc. ...