Lemon contains some limonene and coumarin, which is extremely sensitive to light. If you drink lemonade to bask in the sun, it may really make you black, and because vitamin C in lemons may be destroyed once exposed to the sun, drinking lemonade in the sun will really make you black. However, there are three conditions for drinking lemonade to turn black. The first is to spend a long time in the sun. The second is to drink enough lemonade and take in enough limonene and coumarin. Third, a person's constitution is easy to get tanned.

Lemon is a light-sensitive fruit. Because photosensitive fruit is rich in metal elements such as copper, it can directly or indirectly increase the quantity and activity of melanin-producing related substances. After drinking lemonade, you will be tanned by ultraviolet rays in the sun. In addition, lemon can absorb light and blacken cells. After drinking lemonade, you'd better not expose yourself to the sun. Drinking lemonade at night can whiten the skin.

Lemon has the effect of detoxification and beauty. Long-term drinking can effectively expel garbage toxins from the body and also have the effect of acne. However, people who want to turn white should remember that it is best to drink it at night, because lemon is really a light-absorbing fruit. If they drink lemonade and bask in the sun during the day, it is easy to turn black and the whitening effect may disappear.

The content of vitamin C in lemon is not as high as you think. Among fruits, seabuckthorn and Rosa roxburghii, the king of vitamin C, are not as high as jujube, kiwi fruit and strawberry. If you drink water soaked in dried lemon slices, I'm afraid the result will make you even more disappointed. Vitamin C is a water-soluble vitamin. During the drying process of lemon slices, the loss of vitamin C is almost as much as the evaporation of water. It cannot be expected to help synthesize collagen or whiten skin.