Vitamin c: the cheapest beauty and health care product
The function of natural vitamin C is first manifested in beauty beauty, because it has many skin care functions. First of all, vitamin C can effectively inhibit the production of skin melanin and dilute the melanin that has been produced. Speaking of melanin, we all know that it is the cause of freckles, chloasma and skin blackening caused by sun exposure. In order to prevent and treat these skin diseases, vitamin C supplementation is essential.
Secondly, the function of natural vitamin C also includes promoting the production of collagen in structural tissues and helping the human body to repair aging and damaged skin. Vitamin C can also promote the absorption of iron, prevent anemia, restore the hematopoietic function to normal, and make the skin healthy and energetic. In addition, it can improve skin resistance, prevent eczema and dermatitis, treat trauma and restore fatigue. Vitamin C can also regulate the metabolism of the body, restore the health of the skin, promote the detoxification function of the liver, and reduce the harm of nicotine in tobacco and alcohol to the skin.
The role of vitamin C and its beauty methods
The Function of Vitamin C and Beauty Methods —— Women with Psychological Stress
Vitamin C can relieve psychological stress. When encountering strong psychological pressure, people with emotional instability will consume more vitamin C. Therefore, such people should consume foods rich in vitamin C in peacetime.
Function and Beauty Methods of Vitamin C —— Women in Physiological Period
Because vitamin C can help the body absorb iron, it can help women supplement iron and prevent anemia.
The Function of Vitamin C and Beauty Methods —— Women who are easy to catch a cold
Vitamin C can improve the resistance and immunity, especially for people who are prone to catch a cold.
Second, the benefits of vitamin C.
Promote the formation of collagen
Collagen is a kind of protein, which is distributed among connective tissue, blood vessels, bones and dentin cells, and is the basic supporting substance of animal body shape. Therefore, it can make cells closely arranged, skin compact and bones and teeth firm. After trauma or surgery, it can help cell repair and promote wound healing.
Enhance immune function
Vitamin C can promote antibody formation and increase the concentration of IgA, IgG and IgM in blood. These antibodies attach to foreign viruses and bacteria and guide white blood cells and lymphocytes to destroy them.
Promote mineral absorption
Vitamin C can promote the absorption of calcium, phosphorus, iron and other minerals in the small intestine, so it is very helpful for people with anemia or osteoporosis.
Reduce arteriosclerosis
Vitamin C can strengthen the tissue of blood vessels and reduce the content of cholesterol in blood, which has a good preventive and therapeutic effect on atherosclerotic cardiovascular diseases, hypertension, stroke and other adult diseases.
Antioxidant free radicals and antioxidation
Vitamin C is a kind of substance with strong antioxidant capacity, which can effectively remove free radical substances produced by long-term exposure to adverse environment.
Antitumor effect
The medical community believes that free radicals are related to the occurrence of cancer or aging. Ammonium nitrite is a carcinogen. If there is enough vitamin C in the body, it can prevent nitrite from being converted into ammonium nitrite for curing meat.
Third, the harm of excessive intake of vitamin C.
The recommended daily intake of vitamin C varies with different age groups. Experts suggest that the minimum recommended daily intake for adults is 100 mg and the maximum intake is 2000 mg. However, taking too much or too little vitamin C will do harm to the body. Dietitians point out that many people think that eating vitamin C has many benefits, and it is a water-soluble vitamin. Excess vitamin C will be excreted by the human body, so they try their best to eat it to achieve stronger antioxidant function. However, taking large doses in a short time may cause the following three hazards in the long run:
Hazard 1: increase the risk of stones
After vitamin C is metabolized, oxalic acid will be produced. If you take more than 4000 mg of vitamin C supplements every day for a long time, but you don't supplement the right amount of water, too much oxalic acid can easily combine with calcium in the body to form calcium oxalate, which is difficult to be dissolved and increases the risk of stones. If you are a person who is prone to stones, it is not recommended to take too much vitamin C.
Hazard 2: Diarrhea
Vitamin c is an acidic substance. Excessive use will stimulate the gastrointestinal mucosa, make the intestine too acidic, and then lead to diarrhea. If people with gastritis and ulcers take too much vitamin C, the symptoms may be aggravated.
Hazard 3: Produce withdrawal symptoms.
Taking a high dose of vitamin C for a long time will change the regulation mechanism of vitamin C in the body and accelerate the decomposition and excretion of vitamin C. Once the dose is suddenly reduced, for example, taking 2000 mg every day for a long time, it will suddenly decrease to 1000 mg. Although it still exceeds the daily intake recommended by Fu Weibu, the body can't adapt to the concentration difference for a while, which may lead to withdrawal reaction and early symptoms of vitamin C deficiency scurvy, such as gingival swelling and bleeding. It is suggested that the dosage should be gradually reduced in a decreasing way to alleviate the symptoms of withdrawal reaction.
Fourth, how to supplement vitamin C.
Potatoes and sweet potatoes
Although it is not the highest content, our cooking habit is heating cooking, which leads to the loss of VC in some foods with high content, but potatoes and sweet potatoes do lose the least after cooking!
Spinach and cauliflower
The most common materials in autumn and winter, pay attention to the best way to use them is to scald them with boiling water for 2-3 minutes or scald them with boiling water, so that VC can be preserved most completely. If it's soup, don't let it go.
Fresh jujube
Daily fruits in the north, common fruits have high VC content and are sweet, which is acceptable to everyone, but it is not advisable to eat more at one time.
tangerine
The cheapest kind of high-content fruit, and there are different varieties all year round, and the content is also very high.
cherry
Seasonal fruits have a short fruiting period, about 1 month, and are expensive. You can try them when they are on the market.
Kiwi or Kiwi?
At present, the content of this kind of fruit is very high, and the domestic fruit is not very expensive. The imported fruit is called kiwifruit. VC content and taste are better, but it is more expensive. It's sold separately.
Natural VC tablets
The middle strategy of supplementing VC is to use natural VC tablets, which can be bought on the shelves of health care products in general pharmacies.
Eating more sour food can supplement vitamin C.
Due to the increase of capillary wall brittleness, patients can have extensive bleeding spots all over the body, which is called "scurvy". Sailors and workers who have been living in arid desert areas for a long time often suffer from this disease because they don't eat vegetables and fruits for a long time. Some children who are partial to food will get this disease even if they don't eat vegetables and fruits.
Scientific research has proved that vitamin C cannot be synthesized by itself in the human body, and it must be supplied by eating. The requirement of normal people is 75 mg per day, and it can be increased to 200 ~ 300 mg when it is deficient. In addition to vitamin C supplementation in the diet, foods rich in vitamin C should also be selected. All kinds of fruits with strong sour taste, such as hawthorn, fresh dates, oranges, oranges, lemons, tomatoes and various fresh green leafy vegetables, are good food sources of vitamin C, and animal foods contain less vitamin C.