Vitamin C, also known as ascorbic acid, is an indispensable vitamin in daily life, and it is usually considered that the daily amount of vitamin C supplement is about 50-100mg, which is enough. The main reason is that vitamin C can enhance the body’s immunity, has an anti-allergic effect, and whitening effect. But vitamin C is not useful to supplement a lot every day, the body can not absorb too much. And too much supplementation may also lead to discomfort, such as stomach acidity, stomach bloating, and even hemolysis, and long-term overdose of vitamin C may also lead to the occurrence of urinary tract stones. In the absence of vitamin C, can be carried out through dietary supplements, such as often eat oranges, oranges, grapefruit, these fruits are rich in vitamin C content.