Excessive use can cause adverse reactions: diarrhea, rash, gastric acid increase, gastric reflux, urinary calculi, increased excretion of oxalate and urate in urine, deep vein thrombosis, intravascular hemolysis or coagulation, etc. Sometimes, it will lead to the decrease of phagocytosis of white blood cells.
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.
Extended data When the metabolic rate increases, the demand for vitamin C increases. Infants and premature babies grow fast and need more; The demand for vitamin C in chronic consumptive diseases such as infection and severe trauma is increasing. If the vitamin C provided by food cannot meet the special needs of the body, it will lead to vitamin C deficiency.
Vitamin C in food mainly exists in fresh vegetables and fruits, which cannot be synthesized by human body. Jujube, jujube, orange, hawthorn, lemon, kiwi, seabuckthorn, Rosa roxburghii and other fruits are rich in vitamin C, while green leafy vegetables, green peppers, tomatoes, Chinese cabbage and so on are high in content.
References:
Baidu encyclopedia? vitamin C