What role does vitamin C have?

Vitamin C plays an important role in the formation of collagen. Collagen is an important substance for the development and repair of human tissues and cells, gums, blood vessels, bones and teeth. Help the human body absorb iron; It is often recommended as a substance to prevent sudden infant death (SIDS); Smokers and the elderly need more vitamin C. A cigarette can destroy 25 ~ 100 mg of vitamin C. It is effective in treating trauma, burns and gingival bleeding. Enhance the efficacy of drugs used to treat urinary tract infections; Accelerate postoperative recovery; Help lower cholesterol in the blood; Prevent virus and bacterial infections and enhance the function of immune system; Has anticancer effect; Helps prevent the formation of nitrosamines (carcinogens); Can be used as a natural laxative; Reduce the occurrence of venous thrombosis; Can be used for treating common cold and has preventive effect; Protein cells can be firmly aggregated with each other, thus prolonging life; Increase the absorption of inorganic iron; Can weaken the effect of many substances that can cause allergies; Prevent scurvy. Adults can avoid scurvy by taking 10mg every day, but these values do not keep it in the body. If you want to supplement the amount of metabolic decomposition, you need to supply 60mg a day to meet it. Baby 30mg, children 40-50 mg, teenagers 60mg, pregnant women 80mg, wet nurse 100mg. Excessive dose obviously reduces the disease resistance of white blood cells. Taking too much vitamin C may lead to the formation of oxalic acid and uric acid stones (which can be adjusted by taking calcium, vitamin B6 and drinking enough water every day). Excessive intake will cause some uncomfortable side effects, such as diarrhea, polyuria, rash and so on. When you have the above symptoms, you must reduce the amount. Cancer patients who are undergoing radiotherapy or chemotherapy should not take vitamin C. Because of the lack of gulonolactone oxidase, glucose cannot be converted into vitamin C, and it must be obtained from diet. If the vitamin C obtained from the diet cannot meet the needs, it will lead to vitamin C deficiency or deficiency. Vitamin C deficiency is called scurvy. The early symptoms of scurvy are burnout, fatigue, impatience, shortness of breath, gum pain and bleeding, poor wound healing, transient joint muscle pain and easy fracture. Typical symptoms are gingival swelling and bleeding, gingival ulcer, tooth loosening and increased capillary fragility. Severe cases can lead to subcutaneous, muscle and joint bleeding and hematoma formation. Risk of anemia, decreased muscle fiber (including myocardium), heart failure, severe internal bleeding and sudden death. Children, especially infants aged 5-24 months, should pay attention to scurvy caused by foods lacking vitamin C. Vitamin C deficiency scurvy (scurvy) is caused by vitamin C deficiency, and its clinical features are bleeding and bone lesions. There are a lot of fresh fruits and vegetables in our country's ordinary diet, and babies are breast-fed (the content of vitamin C in breast milk is about 227.2 ~ 397.5 μ mol/L), most of which can maintain the physiological requirement of vitamin C. Therefore, this disease is rare. After a few months of vitamin C deficiency, patients feel tired, weak, depressed, weak, anorexia, malnutrition, pale face, swollen gums, bleeding, tooth loosening and falling off due to gum and alveolar necrosis, muscle pain in bones and joints, skin petechiae, ecchymosis, hyperkeratosis of hair follicles and peripheral bleeding. Children may have pseudoparalysis, swelling and obvious tenderness of lower limbs due to subperiosteal bleeding. 1, choose foods rich in vitamin C, improve cooking methods and reduce the loss of vitamin C in cooking. Children who are artificially fed should add foods containing vitamin C or vitamin C. Patients with diseases, before and after operation, smokers, oral contraceptives and polar workers should increase the intake of vitamin C appropriately. 2, mild patients daily vitamin 200 ~ 300 mg, severe 300 ~ 500 mg, when the infection dose increases, take it three times before or after meals. If the patient cannot take orally or has gastrointestinal malabsorption, intramuscular injection or intravenous injection can be given once a day, and the general course of treatment is about 3 weeks. When the symptoms are obviously improved, it is reduced to 50 ~ 100 mg, taken orally three times a day. 3. Keep your mouth clean, prevent or treat secondary infection, relieve pain and other symptomatic treatments. Patients with severe anemia can receive blood transfusion to supplement iron. In severe cases, there is no need for surgical treatment if there is a huge subperiosteal hematoma or fracture. After vitamin C treatment, the hematoma can gradually disappear and the fracture can heal itself, but it often takes more than 65,438+0 months. If there is bone dislocation, the recovery is slow. The synthesis of hydroxyproline in collagen molecules of vitamin C deficiency purpura needs vitamin C, so vitamin C deficiency affects the synthesis of collagen, which reduces the toughness of blood vessel wall and surrounding connective tissue, increases the brittleness of capillaries and causes bleeding. It is characterized by skin bleeding around hair follicles, muscle bleeding, gingival swelling and hyperkeratosis. Vitamin c treatment is effective. The main sources of foods rich in vitamin C are vegetables and fruits, such as vegetables, leeks, boiled vegetables, spinach, bell peppers and other dark vegetables and cauliflower, as well as oranges, red fruits, grapefruit and other fruits. Wild amaranth, alfalfa, Rosa roxburghii, Hippophae rhamnoides, kiwi fruit, jujube and so on are particularly rich in content. Vitamin C is one of the most popular and widely used vitamins. There are tablets, long-acting tablets, syrups, powders, chewable tablets and other different preparations. Pure vitamin C is glucose from corn. The difference between natural vitamin C and synthetic vitamin C depends on everyone's digestive ability. The best vitamin C preparation is a vitamin P- vitamin C complex containing bioflavonoids, hesperidin and rutin. Vitamin C extracted from rose hips contains bioflavonoids (vitamin P) and enzymes that help to absorb vitamin C. This is the vitamin C with the highest nutritional value.