I have always had a good impression on convex and concave health care products, which are cheap, safe and easy to use. I ate them for less than three weeks without any side effects. Although I don't think I really turned white, I obviously don't feel tanned easily. I went to Hainan for a few days two days ago and was exposed to strong ultraviolet rays every day. It's amazing that I didn't turn black when I came back.