(1) trotters and pigskin contain a lot of collagen, which is the main raw material for the growth of skin cells. It can also increase the accumulated water in the skin, make the skin tender, smooth and full, and reduce the dryness of the skin.

(2) Winter melon seeds and loofah contain many enzymes, which can decompose melanin and whiten skin. Luffa also contains hormone active substances.

(3) Tomatoes are rich in glutathione, which can inhibit the activity of aminoacylase and help to reduce pigmentation.