Tuesday, June 23, 2020

Can supplementing high-dose vitamin C prevent colds

Vitamin C, also known as L-ascorbic acid, is a water-soluble vitamin. Vitamin C in food is absorbed by the upper part of the human small intestine. Once absorbed, it is distributed to all water-soluble structures in the body. In our daily life, taking vitamin C to fight colds is a familiar remedy for many people, because vitamin C can enhance the body's ability to resist stress and immunity to the external environment. However, according to the results of a new study, vitamin C is useless for preventing cold viruses.

For a long time, vitamins have been considered to be extremely beneficial to the human body. As the medical profession generally believes, vitamin C supplementation can prevent colds. Many people eat all kinds of vitamin products for different purposes. However, more and more recent studies have broken these "vitamin myths" and questioned the efficacy of many vitamins.

A comprehensive analysis of 55 previous studies by Robert Douglas of the Australian National University and Harry Hemira of the University of Helsinki found that even if a person supplements 2 grams of vitamin C per day-more than 33 times the dose recommended by the doctor, the cold Still catch a cold.

Abnormal stimulation of the human body, such as severe pain, cold, hypoxia, and strong mental stimulation, will cause tension to resist abnormal stimulation. This state is accompanied by a series of physical reactions including sympathetic excitement, increased adrenal medulla, and increased secretion of corticosteroids. Adrenaline and norepinephrine secreted by the adrenal medulla are tyrosine-derived amines, and vitamin C is required in this process.

So who is suitable for vitamin C supplementation?

1. People who are easily tired.

2. People who work in polluted environment. People with high vitamin C in the body will hardly absorb harmful elements such as lead, cadmium and chromium.

3. People who like smoking. Smokers who eat more foods containing vitamin C can help increase the resistance of cells, maintain the elasticity of blood vessels, and eliminate nicotine in the body.

4. People engaged in strenuous exercise and high-intensity labor. These people will lose a lot of vitamin C due to excessive sweating and should be supplemented in time.

5. Patients with scurvy. This disease is caused by the lack of vitamin C in the diet, which causes poor formation of connective tissue and increased brittleness of the capillary wall. Vitamin C-rich foods should be eaten.

6. People with pigment spots on their faces. Vitamin C has an antioxidant effect, and supplementing vitamin C can inhibit the formation of pigment spots and promote their regression.

7. People who take medicine for a long time. Taking aspirin, sleeping pills, anticancer drugs, tetracycline, calcium products, contraceptives, antihypertensive drugs, etc., will reduce the body's vitamin C, and may cause other adverse reactions. Vitamin C should be added in time.

8. Cataract patients. Vitamin C is a nutrient element of the lens in the eye. Insufficient intake of vitamin C is one of the factors leading to cataract. Patients should supplement vitamin C.

In addition, it is worth noting that pig liver cannot be eaten with vitamin C, because vitamin C encounters trace metal ions and is easily damaged by oxidation, especially copper ions. Pork liver is a food rich in copper, and contains about 2.6 mg of copper per 100 g of liver. If eaten together with vitamin C, the copper in pig liver can make vitamin C lose its original biological function. Similarly, sheep liver and beef liver can not be eaten with vitamin C.

Milk should not be eaten with vitamin C, because milk is rich in vitamin B2 with certain oxidizing properties. Vitamin C is easily oxidized by vitamin B2 when taken at the same time, and vitamin B2 is reduced. the goal of.

Vitamin C does not prevent colds, and it is widely present in fresh fruits, green leafy vegetables and meat, so normal people are not lacking and do not have to take it deliberately.

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