Taking vitamin C for a long time will have some side effects. Over time, it may lead to stones. In addition, there is no need to take vitamin C for a long time. It can be taken in vegetables and fruits.

Because vitamins are not components of various human tissues and cannot provide energy, excessive intake is not beneficial to the human body, and some may cause toxic side effects or even death.

For example, fat-soluble vitamins, commonly used include vitamin A, vitamin D, vitamin E, etc. Fat-soluble vitamins require bile to help absorb them after oral administration, and overdose can lead to poisoning. In particular, long-term overdose of vitamin A can cause severe poisoning or even death. It has also been reported that pregnant women taking large amounts of vitamin A have potential teratogenic effects; large amounts of vitamin D can cause hypercalcemia, leading to calcification of soft tissue in urinary system stones. For example, feeding a large amount of vitamin D-fortified foods to young children can cause calcification of the baby's skull and front of the meridian line, leaving no room for brain development, thus affecting intellectual development and making recovery difficult; long-term use of large doses of vitamin E can cause gastrointestinal disorders, quarrels, and inflammation, dizziness, blurred vision, etc., which can cause menorrhagia or amenorrhea in women.

Water-soluble vitamins, commonly used include vitamin C, vitamin B1, etc. Water-soluble vitamins are easier to absorb in the intestines after oral administration and are not stored in the body to a certain extent. If too much is taken in, they will be excreted from the urethra through the kidneys, so they generally have no toxic side effects. However, there are also reports of urinary system stones caused by oral administration of large doses of vitamin C, and large intravenous injections of vitamin C can cause thrombosis or intravascular hemolysis; anaphylactic shock can occur after intramuscular injection of vitamin B1; and high-dose intravenous injection of vitamin B6 Can cause headache, abdominal pain, rash and other reactions.

In summary, it is inappropriate to use vitamins as "tonics" at will. The indications for use should be strictly controlled and used rationally to prevent abuse, waste and damage to the human body

We know that a lack of vitamins can damage your health and lead to serious illness. But, did you know: excessive intake of vitamins and trace elements can also seriously damage our health! Let's talk about the dangers of taking too many vitamins:

Vitamin A A large amount of vitamin A can reduce blood flow in the brain of healthy people, cause headaches, brain swelling, and even death. Too much vitamin A can also damage the joints of the arms and legs.

Vitamin B Excessive consumption of B vitamins can also cause many problems. For example, too much vitamin B6 can cause neurotoxicity in the human body.

Vitamin C Too much vitamin C can cause stomach pain and intestinal dysfunction. At the same time, taking a large amount of vitamin C can also affect the production of red blood cells, making people weak and fatigued. In addition, cancer patients who are undergoing radiotherapy or chemotherapy should not take it. Vitamin D Taking too much vitamin D (adults > 20,000IU, children > 1,800IU) may cause hypervitaminosis D, which is manifested as: thirst, eye inflammation, skin itching, vomiting, diarrhea, frequent urination, and causing cavities in the human body. Abnormal sedimentation of the device.

Vitamin E Excessive use of vitamin E can cause platelet aggregation and thrombosis. If combined with estrogen, it will also cause thrombophlebitis.

In addition, taking large amounts of vitamins will also affect the effects of taking other drugs. Once you become addicted to taking vitamins, suddenly stopping taking them will cause physical discomfort. Moreover, scientists believe that if you can get enough nutrients from enough food, you don't need to take any vitamin drugs at all.

Therefore, to live a healthy and long life, you must first rely on improving your immune function. Therefore, it is particularly important to adhere to appropriate physical exercise, a reasonable diet, and a regular life! People who really need to take vitamins and trace elements should seek guidance from a doctor to ensure that they are symptomatic and safe.

Pregnant women should be careful when taking vitamins

Medical experts say that many pregnant women take multivitamins, but they do not know that although vitamins are a kind of health care medicine, excessive vitamins can also have adverse effects on the fetus and cannot be ignored. side effects. For example, taking large amounts of vitamin C for a long time can lead to miscarriage; taking large amounts of vitamin A can cause skeletal deformities, genitourinary system defects, and cracked hard palates in babies; taking too much vitamin E can cause abnormal fetal brain development; and too much vitamin D can cause There are problems with the development of the fetus's large arteries and teeth.

Vitamins should be taken after meals

In people's minds, vitamin drugs are "supplements" and "substitutes" for vegetables and fruits, with few side effects and high safety. , Therefore, many people take vitamin medicines just like eating vegetables and fruits, very casually, sometimes before meals, sometimes after meals, with no rules. Most doctors also do not clearly tell patients whether vitamins should be taken before or after meals. Most manufacturers of vitamin medicines only indicate usage and dosage on the bottle label, but do not indicate precautions or instructions on whether to take it before or after meals.

In fact, taking vitamin medicines is the same as taking other medicines. There are certain regulations, requirements and precautions, that is, take them after meals. Because vitamin drugs are mainly absorbed from the small intestine after oral administration, if they are taken before meals, since there is no food in the gastrointestinal tract, the drugs will be quickly absorbed into the blood when taken on an empty stomach, resulting in an increase in the concentration of vitamins in the blood, which will pass through the body before they are utilized. The kidneys excrete it from the body through the urethra, which significantly reduces the efficacy of the drug.

For example, the utilization rate of vitamins B1, B2 and B6 decreases when taken on an empty stomach, while the absorption rate is stable when taken after meals. The absorption rate rises linearly with the increase in dosage. This is because the discharge of gastric contents slows down after eating, allowing the drug to be slowly transported to the upper part of the small intestine, thus avoiding saturation in the absorption mechanism.

Taking coenzyme B12 and vitamin C after meals is easier for absorption, but they cannot be taken at the same time. If taken at the same time, the bioavailability of B12 will be reduced and the efficacy of the medicine will be greatly reduced. To avoid B12 deficiency, the two should be taken 2 to 3 hours apart.

Similarly, oral vitamin D2 should also be taken after meals. It is best to eat some fatty foods (such as fried dough sticks, pork, etc.) first to facilitate the dissolution and absorption of the drug. If used to treat tetany in infants, calcium should be supplemented first.

Vitamin AD (cod liver oil pills), vitamin E and vitamin PP (niacin, niacin) should also be taken after meals. AD pills should be taken 15 minutes after meals and with fatty foods to aid absorption. Because the side effects of vitamin PP include skin flushing, itching, burning, and even heart palpitations, urticaria, nausea, vomiting, etc., taking it after meals can significantly reduce the side effects. In order to avoid the irritating reaction to the gastrointestinal tract caused by long-term and large-dose taking of this product, it should be taken after meals.

There are a variety of vitamin products on the market today that make people overwhelmed. However, relevant experts warn that excessive intake of vitamins will not only fail to ensure nutritional balance, but will bring unexpected dangers.

Many people mistakenly believe that more vitamin supplements are better, so they take vitamin drugs for a long time. As everyone knows, extremes must lead to reverses. When the human body is not deficient in vitamins, taking large doses of vitamins will not only cause waste, but may also cause various adverse reactions.

Excessive Vc is harmful to health

Vitamin C is the most familiar vitamin and is considered to be the least toxic. Some people take vitamin C to enhance resistance when they have a cold, but if it exceeds 1 gram per time, a large dose of vitamin C will not only enhance the body's immune mechanism, but also provide nutrients for the growth of the virus, which is not worth the gain. Taking 4 to 12 grams of vitamin C orally daily can cause urate to precipitate in the urethra to form stones. Taking more than 1 gram of vitamin C daily can cause skin redness, increase intestinal peristalsis, and cause abdominal cramps and diarrhea. If the daily dosage exceeds 0.6 grams, frequent urination will occur. Children taking large doses of vitamin C for a long time may affect bone development. In addition, taking large doses of vitamin C can also reduce the fertility of some women, affect fetal development, and even lead to congenital scurvy.

Once people who have been taking large doses of vitamin C for a long time stop taking it, the body will still maintain a high decomposition rate and high excretion rate of vitamin C, so that even if the vitamin C content in the food is sufficient, vitamin C deficiency will occur. symptoms.

Excessive Va, severe poisoning

Vitamin A plays an important role in bone growth and maintenance of gonadal function, but excessive intake can also lead to poisoning. Acute poisoning manifests as dizziness, drowsiness, headache, vomiting, diarrhea and other symptoms. Chronic poisoning manifests as bone and joint pain, swelling, skin itching, fatigue, limb weakness, irritability, abdominal pain, and oligomenorrhea in women.

Regular intake of Ve for blurred vision

Vitamin E is an antioxidant and is considered to have the effects of preventing cardiovascular and cerebrovascular diseases and anti-aging, and is widely used.

But if taken for a long time, the daily dose reaches 400 mg to 800 mg, which can cause blurred vision, breast enlargement, flu-like syndrome, headache, dizziness, nausea, and stomach cramps. Long-term use of more than 800 mg per day will change endocrine metabolism, immune response, reduce sexual function, and may cause thrombophlebitis or embolism.

Excessive Vd leads to stagnant growth

Vitamin D is indispensable for "calcium" metabolism in the body and is very effective in preventing and treating rickets in children. However, overdosing or taking large amounts in a short period of time can also lead to serious poisoning reactions. There are significant individual differences in toxic doses. Some children develop stagnant growth after taking 1800 units of vitamin D for a long time.

Excessive Vb6 and drug dependence

Vitamin B is a very important water-soluble vitamin. It has been reported that taking 200 mg of vitamin B6 per day can lead to drug dependence. Taking 2 to 6 grams per day for several months can lead to unsteady gait, numbness and inflexibility of the hands and feet.

It should be pointed out that the above-mentioned vitamin poisoning usually only occurs under the condition of long-term overdose. For most people, the amount of drug that causes poisoning is significantly greater than the usual therapeutic dose. If your condition requires additional vitamin supplements, you can safely take the medication under the guidance of a doctor, and don't be too nervous. If you are taking medication purely for health care, or taking vitamins for a long time without the guidance of a doctor, children, pregnant women, the elderly, patients with chronic diseases, patients with reduced kidney function, and people with special constitutions may be taking vitamin drugs at inappropriate dosages. If it is too large, toxic reactions may occur. (Feng Tao)