For healthy people, foods such as meat, fish, fruits, cereals and vegetables have high vitamin content. As long as the diet is reasonable, it can usually meet the needs of human metabolism. However, some people regard vitamins as tonics, for fear of insufficient content in the diet, and make their own decisions, often taking them or even abusing them, thinking that the more the better. In fact, it is harmful to human health. Vitamins, like other drugs, will also have adverse reactions if they are used unreasonably or indiscriminately. Some people can take drugs for a long time, or the dose is too large, which leads to the accumulation of drugs in the body and causes symptoms of drug poisoning; There are also some people who have caused some organ damage because of excessive medication; Others will have allergic and intolerant reactions to drugs. With the improvement of living standards and the enhancement of health care awareness, vitamin supplementation seems to have become the most popular fashion for people to seek health. However, there are many kinds of vitamins, each of which has its own unique efficacy. Abuse of vitamins has many hazards. The common abuse of vitamins mainly includes the following types: vitamin C is involved in the formation of antibodies and collagen, tissue repair (including some redox effects), phenylalanine, tyrosine and folic acid metabolism. The utilization of iron and carbohydrate, the synthesis of fat and protein are necessary to maintain immune function, hydroxylation and serotonin, maintain the integrity of blood vessels and promote the absorption of non-heme iron. It is also the vitamin that is most easily fooled by advertisements. It widely exists in all kinds of natural foods, and its content is generally high in vegetables and fruits. It has little toxicity and is the most needed vitamin for human body. Therefore, it is also people's favorite vitamin to abuse. In fact, as long as our diet structure is reasonable, the body will only absorb more vitamin C from food, not less. Abuse of vitamin C is harmful: taking large doses of vitamin C orally can produce symptoms of digestive intolerance such as nausea, vomiting, diarrhea and abdominal pain. Excess vitamin c is excreted through the kidneys. In human body, excessive vitamin C can combine with inorganic salts in food, leading to the formation of oxalate stones and urate stones in urinary system. Hemolysis, thrombosis or sudden death can occur when the daily dose exceeds 5g or a large dose of rapid intravenous injection. If pregnant women take a large amount of vitamin C for a long time, it will lead to the dependence of the fetus on vitamin C after birth. If a large amount of vitamin C is not given after birth, it will lead to vitamin C deficiency in infants and even scurvy. Patients with advanced cancer may suffer from massive acute disintegration of tumor tissue after applying large doses of vitamin C. Now there is a fruity vitamin C on the market, so some parents take it as candy and give it to their children for a long time without medical advice, regardless of whether the children need to supplement vitamin C. Therefore, it is often seen that some children have unexplained symptoms such as indigestion, restlessness, insomnia, edema and diarrhea, which are caused by excessive use of vitamin C. Repeated intravenous injection of vitamin C also leads to itchy papules all over the body, and even anaphylactic shock. Excessive use of vitamin C will lead to false negative reaction in the detection of blood in stool (an important indicator of ulcer, gastrointestinal bleeding and intestinal cancer), and will also hinder the detection of diabetes. This often misses the illness. In the natural environment, the chemical structure of vitamin C is unstable and easy to decompose, and the substances formed after decomposition are harmful to human body. People who like to take vitamin C for a long time naturally have a lot of vitamin C at home. If stored improperly or for a long time, these vitamin C may become "poison". Vitamin D Vitamin D can participate in the metabolism of calcium and phosphorus, promote their absorption, play an important role in bone formation, and is indispensable for the metabolism of calcium in the body. At present, vitamin D has almost become a routine medicine for infants. Neither doctors nor parents can forget to supplement their children with vitamin D. Therefore, due to the excessive use of vitamin D, there are more and more cases of vitamin D poisoning. Babies taking 30,000 to 40,000 units of vitamin D every day may be poisoned to death. If you don't follow the doctor's advice and use vitamin D too much, you may have poisoning symptoms such as not thinking about eating, nausea, vomiting, dry mouth, constipation or diarrhea, emaciation, fatigue, polyuria, and pain when bones are compressed. If pregnant women take vitamin D improperly, it will also cause damage to the fetus. Children may experience growth stagnation after taking vitamin D 1 for a long time. There is a story about vitamin A: In order to prevent a child from catching a cold in winter, a child's parents bought vitamin A tablets in a drugstore. Ignorant, they thought the more the better, and gave them 100 times the daily demand. As a result, the child was itchy all over, dehydrated violently, and his blood calcium was so high that his heart almost stopped. The result was sent to the hospital for emergency treatment. According to the doctor's diagnosis, these symptoms are all toxic reactions caused by excessive intake of vitamin A. Children are particularly sensitive to vitamin A, especially when they are weak. (Disclaimer: Image source network, please contact to delete if there is any infringement) Vitamin A is a fat-soluble vitamin, which is only soluble in fat and insoluble in water. So unlike vitamin C and vitamin B, which are soluble in water, they are excreted quickly with urine. Vitamin A will accumulate in the body and become poison. If adults are given 654.38 million+units of vitamin A, acute poisoning will occur. If you take 20,000 to 40,000 units a day for a long time, it can cause chronic poisoning. In acute poisoning, adults may have dizziness, nausea, vomiting, peeling and other symptoms: infants may have brain edema, increased brain pressure, fontanel protrusion, fever, sweating, loss of appetite, rash, oliguria and so on. Symptoms of chronic poisoning include gait instability and pain in the ulna, radius and tibia of the forearm when compressed. If it is pregnant, it will have adverse effects on the fetus; Children see thinning hair or baldness, cracked palm skin, headache, insomnia, emaciation, premature bone growth, etc. Vitamin B 1: Excessive vitamin B can cause nervous convulsion, headache, fatigue tremor, neuromuscular paralysis, rapid pulse, peripheral vasodilation, arrhythmia, edema and fatty degeneration. Excessive intramuscular injection can cause urticaria or anaphylactic shock. Therefore, reducing the injection of vitamin B 1 can reduce the occurrence of various toxic reactions and allergic reactions. Vitamin B2: Excessive use of vitamin B2 will block renal tubules and produce symptoms of renal dysfunction, such as oliguria. Vitamin B6: It has the function of stopping vomiting, so some pregnant women who vomit during pregnancy think that since it is a vitamin drug, it must be beneficial and harmless, so they take vitamin B6 themselves. In fact, excessive use of vitamin B6 can cause convulsions, damage the placenta and hinder fetal development. Therefore, pregnant women should avoid using large doses of vitamin B above 25mg. Anaphylactic shock can also occur when vitamin B6 is injected into muscles. In addition, excessive use of vitamin B6 will weaken the efficacy of anti-inflammatory drugs. Excessive use of vitamin B 12 can cause allergic reactions such as asthma, urticaria, eczema, drug eruption, facial edema and chills. Nerve excitement, precordial pain and palpitation may also occur. Therefore, in patients with angina pectoris, vitamin B 12 can often aggravate the condition or increase the number of attacks. The drug is also not suitable for patients with acute thromboembolism and polycythemia. Folic acid: (Folic acid is a water-soluble B vitamin, which consists of residues of pterin, p-aminobenzoic acid and glutamic acid) It can prevent rough skin, but excessive use will lead to rapid heartbeat, nausea and vomiting, and damage the liver. Vitamin E Vitamin E has a strong antioxidant effect. Therefore, it has anti-aging and beauty functions. Due to the increasing popularity of beauty and anti-aging, vitamin E is increasingly favored by people. As an important additive, it is widely used in cosmetics, food and beverages. Even some people simply buy it themselves and take it every day to achieve the purpose of beauty and anti-aging. Vitamin E is a fat-soluble vitamin. It must be dissolved in fat to be absorbed by the human body. Its metabolism needs the liver to complete, so its metabolism is slow and it is easy to accumulate poisoning. Long-term oral administration of vitamin E can cause fatigue, nausea, headache, dizziness, blurred vision, stomatitis, menorrhagia or amenorrhea and other toxic symptoms. For hypertensive atherosclerotic heart disease, thyroid dysfunction, diabetes, obesity, hypercholesterolemia, hyperlipidemia and liver dysfunction, it is easy to cause platelet aggregation and thrombosis. Therefore, diabetic patients with severe hypertension, myocardial damage and insulin therapy should be especially cautious if they use vitamin E in large quantities for a long time. In the human body, there is a strict balance between various vitamins. When a vitamin is deficient, it is often accompanied by the deficiency of other vitamins. If a large number of vitamins are used alone, it will also cause the lack of other vitamins. For example, a large amount of vitamin C will destroy vitamin B 12 in the body, and a large amount of vitamin B 1 will cause niacin deficiency; Taking a large amount of vitamin B 12 will lead to folic acid deficiency. Although vitamins have irreplaceable functions, the more the better. Don't think that you can use them at will to enhance your resistance, stay young and promote bone growth. Only under the guidance of a doctor can we use, treat and prevent diseases rationally, otherwise it will be harmful and useless. @ Qingfeng Plan @ Headline Health # Qingfeng Plan # Disclaimer: The above content comes from the Internet and the copyright belongs to the original author. If there is any infringement of your original copyright, please let us know and we will delete the relevant content as soon as possible.