Vitamin is a class of compounds necessary to maintain the normal metabolism and function of the human body, is one of the six nutrients of the human body, once lack will cause serious health damage to the human body。Now people generally have a strong sense of health, many people think that the more vitamins to eat the better, so they take vitamins as a nutritional supplement, or even health care products。This is a myth。If the body's ability to absorb vitamins is impaired or some drugs interfere with the effect, may lead to secondary vitamin deficiency, in this case should be under the guidance of a doctor, the use of drugs for vitamin supplementation。The pharmacists of the Department of Pharmacy, Affiliated Provincial Hospital of Shandong First Medical University (Shandong Provincial Hospital), gave you the knowledge of popular science vitamin use today。

　　Long-term or excessive use of vitamins can lead to vitamin poisoning and even greater harm to the body。Under normal circumstances, vitamins should not be treated as nutritional products。

　　Vitamin C is known as an "antioxidant" and has been widely used in all aspects of our lives。It can also promote the body's absorption of calcium and folic acid, has a certain role in the treatment of anemia, can improve immunity, but also can promote collagen synthesis。Vitamin C has a certain role in recovery after surgery, and can also reduce blood cholesterol levels and reduce the formation of venous thrombosis。In addition, the appropriate use of vitamin C has anti-cancer effects。

　　But when you take too much vitamin C, it can cause a variety of harm。Hemolysis may occur first。Then it leads to excessive urate, if the urate is more, it is easy to form stones in the urethra, and the situation of kidney stones。Diarrhea may also occur。In addition, it is easy to lead to excessive stomach acid, gastroesophageal reflux and other conditions。

　　Vitamin D has a better effect of preventing and alleviating osteoporosis, because vitamin D can regulate the absorption rate of calcium in the intestinal mucosa, and can also promote the rate of calcium reabsorption in the kidney, so that calcium can be better deposited in the bone。Therefore, for people with waist and knee pain, waist and leg pain and osteoporosis, proper supplementation of vitamin D can promote calcium absorption and utilization, and play a positive role in preventing and alleviating osteoporosis and preventing waist and knee pain。

　　Vitamin D can also better regulate the proliferation and differentiation of immune cells, and has a positive effect on promoting the generation of immune cells. Therefore, for people with low resistance and easy to get sick, proper supplementation of vitamin D also has a positive effect on improving the body's immunity。

　　Vitamin D can also provide rich raw materials for hormone synthesis, and hormones play a very important role in improving the body's ability to regulate metabolism。Therefore, proper supplementation of vitamin D can promote hormone synthesis and improve the overall metabolic regulation level of the body。

　　However, when the body takes in a large amount of vitamin D, the vitamin D feedback in the body is unbalanced, resulting in long-term calcium and phosphorus increase, high blood calcium concentration, and the regulation of calcitonin makes the blood calcium deposit in bone and other organs and tissues, affecting its function。If deposited in the kidney can produce tubular necrosis, renal calcification, severe renal atrophy, chronic renal impairment。Calcium deposits in small bronchi or alveoli, damage respiratory epithelial cells, can cause ulcers or calcification foci。If deposited in the nervous system, cardiovascular and other vital organs，There will be more calcification in the tissue，Produce irreversible and serious effects，In the beginning, there may be loss of appetite, anorexia, irritability, low fever, vomiting, diarrhea, constipation, frequent urination, nocturnal urination, dehydration and so on，In severe cases, there are headaches, anemia, and heart murmurs，He even had convulsions。This shows that the consequences of taking too much vitamin D are terrible。

　　In addition to vitamin C and D, vitamin E is also closely related to our lives。Vitamin E has the function of promoting body metabolism, whitening, and keeping skin smooth and delicate。Taking small doses of vitamin E is beneficial to the body, and taking large doses of vitamin E for a long time will also cause certain harm。Vitamin E is a fat-soluble vitamin, which can cause hyperlipidemia and increase the burden of kidney when taken in large quantities for a long time.Can cause impaired liver function;It will cause platelets to aggregate, form blood clots, and cause various embolisms in the body。At the same time, it will also affect the absorption of vitamin A, resulting in night blindness, dry eye disease and other eye diseases。

　　In short, vitamins are first and foremost a medicine and must be used under the guidance of a doctor。If vitamin deficiency, it is best to supplement through food, you can eat more vegetables and fruits。Once taken, remember not to take too much, should follow the doctor's advice to take a moderate amount。