Publish Time: 2022-07-13 Origin: Site
First of all, there are many factors that determine whether our skin is black or white, such as genetics, sun exposure, endocrine hormone levels and so on. But generally speaking, the color of the skin is mainly determined by the content of melanin in the skin.
The origin of melanin production lies in tyrosinase. After a series of chemical and oxidation reactions, tyrosine in melanocytes forms eumelanin and reaches the surface of the skin. If the skin metabolism is not smooth, it will lead to a large amount of pigmentation and aggregation. The color of the skin will deepen or form spots causing uneven skin, thereby making people darker.
Therefore, inhibition of tyrosinase biosynthesis is the key to whitening. Vitamin C can inhibit the activity of tyrosinase, block the production of melanin, has certain antioxidant properties, and can restore the formed melanin to colorless melanin precursor, thereby improving dull skin and achieving a whitening effect.
According to the recommendations of authoritative organizations such as the Chinese Nutrition Society and the Japanese Ministry of Health, Labour and Welfare, in order to prevent people from getting sick due to lack of vitamin C, it is recommended that each person consumes 100 mg of vitamin C per day. This dose is generally enough to eat more fresh fruits and vegetables every day can be supplemented.
If you want to achieve the effects of whitening, anti-oxidation, and promoting collagen synthesis, some scientific studies have shown that you need to consume at least 1000 mg of vitamin C per day. Can cause a negative reaction to the body.
However, the recommended tolerable intake of vitamin C by the Chinese Nutrition Society is 1000 mg/day. An appropriate amount of vitamin C supplementation can play a role in firming the skin, strengthening the bones and teeth, enhancing immune function, promoting mineral absorption, reducing arteriosclerosis, anti-tumor and anti-oxidation.
Excessive (long-term daily intake of 1-4g or more) will cause high iron red blood cell anemia, diarrhea, abdominal pain, gastrointestinal bleeding and other gastrointestinal discomfort, which will reduce the body's disease resistance and immunity, and some people will also cause hyperuricemia. Symptoms, accelerate the formation of kidney and bladder stones, etc.
Therefore, the daily intake is best not to exceed 1000mg!
1. Eat 3 to 4 times a day. Because vitamin C is a water-soluble vitamin, in general, it will be excreted with body fluids within 3-4 hours. For example, supplement 800mg of vitamin C every day, and supplement about 200mg at intervals of 3 to 4 hours, which can ensure the content of vitamin C in the body, the absorption effect will be better, and the whitening effect will naturally be better.
2. Eat 1 to 2 hours after meals. Vitamin C can't be taken on an empty stomach, and don't take it with tea. The best effect is to take it after meals. It's hard to think about it for a long time.
3. The water temperature of VC effervescent tablets should not be too high. Since vitamin C is not resistant to high temperature, when taking vitamin C effervescent tablets, it should not be dissolved in superheated water, but should be dissolved in warm or cold water, otherwise the medicinal properties will be lost.
4. Insist on taking. Depending on the individual's constitution, under normal circumstances, oral administration will take at least 3-6 months, and the effect will be more obvious, because it is absorbed by the human body through the stomach and intestines, and it takes a process to gradually help the cells to renew, in order to improve the skin color from the root. In addition, insisting on eating VC on weekdays also has a certain effect on whitening and lightening spots.
5. Do a good job of sun protection. Don't think that taking vitamin C will make you immune to ultraviolet rays. Eat vitamin C while basking in the sun. Even if vitamin C is a magic medicine, it will not work.
Long-term intake of quantitative vitamin C tablets, sudden withdrawal of the drug will cause a phenomenon called vitamin C withdrawal deficiency. The reason is that the amount of vitamin C that our body needs every day is not that much. When the amount of supplementation exceeds the required amount , the body will habitually excrete the excess amount. When one day you stop taking vitamin C tablets, the body will still habitually let the body excrete that amount of vitamin C.
During this period of time, it is very easy to cause the lack of vitamin C in the body, and it is more likely to suffer from scurvy than before taking the medicine, also called "rebound scurvy". Therefore, when you stop taking vitamin C, you should also allow the body to have a transition period, and it is advisable to gradually reduce the dose.
Whitening tips
In addition to taking vitamin C tablets for whitening, you can also eat more fruits and vegetables rich in VC.
Fruits rich in vitamin C are: prickly pear, fresh jujube, kiwi, pear, apple, banana, peach, cherry, strawberry, lychee, etc.;
Vegetables rich in vitamin C are: peppers, bitter gourd, citrus, tomatoes, cauliflower, green leafy vegetables, cabbage, celery, lettuce, pumpkin, etc.