Vitamin C plays an important role in maintaining and synthesizing connective tissue based on collagen. Vitamin C can promote cell metabolism, so it has a certain effect on skin whitening. However, excessive intake of vitamin C will cause metabolic disorder of skin pigment cells, that is, abnormal skin color and white spots. If it becomes vitiligo, it will affect the appearance.
If vitamin C4 is taken orally every day, urinary calcium oxalate stones and kidney calculi may appear one week later, and in severe cases, hematuria and renal colic may occur. Excessive vitamin C makes urine acidic, which leads to oxalate stones.
Large doses of vitamin C will also reduce women's fertility and affect the development of embryos. Because a large dose of vitamin C is easy to form an "acidic constitution" in the body, which is not conducive to the development of germ cells.
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In human body, vitamin C is an efficient antioxidant, which is used to reduce the oxidative stress of ascorbate peroxidase substrate. There are many important biosynthetic processes that also require vitamin C.
Because most mammals can synthesize vitamin C through the liver, there is no problem of deficiency. However, a few animals, such as humans, primates and groundhogs, cannot synthesize themselves and must be ingested through food and drugs.
The main food sources of vitamin C are fresh vegetables and fruits. Among vegetables, peppers, chrysanthemums, bitter melons, beans, spinach, potatoes and leeks are rich in content; Among fruits, jujube, fresh jujube, strawberry, citrus and lemon are the most abundant. There is also a small amount of vitamin C in animal viscera.
References:
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