At the same time, it can enhance immunity, prevent colds, virus and bacterial infections, prevent cancer, allergies and scurvy, promote the absorption of calcium and iron, whiten skin, reduce harmful cholesterol and hypertension, and prevent arteriosclerosis.
The disadvantages of excessive intake of vitamin C are:
1, taking too much VC supplement in a short time will produce side effects such as polyuria, diarrhea and rash;
2. Taking excessive VC supplements for a long time may lead to oxalic acid and uric acid stones;
3, children take too much during their growth period, which is prone to bone diseases.
4, a one-time intake of VC2500-5000 mg or more, may lead to a large number of red blood cells rupture, hemolysis and other critical phenomena.
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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.
Performance of insufficient intake:
Ascorbic acid deficiency has lost its most important function, that is, the hydroxylation process of hydroxyproline and lysine cannot proceed smoothly, and the synthesis of collagen is blocked, causing scurvy. Early manifestations include fatigue, burnout, gingival swelling, bleeding, and slow wound healing. In severe cases, visceral bleeding may occur, which is life-threatening.
The nutritional deficiency caused by long-term vitamin C deficiency is called scurvy, which is characterized by swelling and bleeding of gums, petechiae and ecchymosis on the skin, and massive bleeding all over the body. As early as16th century, the prevalence of this deficiency has been observed.
Large-scale vitamin C deficiency is rare, but it still occurs in infants and the elderly. Scurvy is rare in adults, but those who restrict their diet or do not eat fruits and vegetables for a long time often lead to vitamin C deficiency.
References:
/baike.baidu.com/item/%e7% bb% B4% e7% 94% 9f% e7% B4% a0c "target =" _ blank "title =" Only one link can be selected to take effect "> Baidu Encyclopedia-Vitamin C.