Ellagic acid is a kind of natural organic substance, it is mostly found in some fruits and nuts, it is a natural polyphenolic substance, this substance turns blue when it encounters ferric chloride, and turns blue when it encounters sulfuric acid. Yellow, this substance can improve the body's anti-cancer ability after being absorbed by the body, and can nourish the skin. After ellagic acid is absorbed by the human body, it can also remove melanin in the body, accelerate the decomposition of melanin, and prevent the accumulation of melanin on the skin surface. Can play a certain whitening effect, so this substance is widely used in the production of cosmetics and pharmaceuticals.