Vitamin C has the effect of enhancing immunity. But for many women who pursue beauty, vitamin C also plays a very important role, which is whitening. Many whitening products even include vitamin C as one of their promotional points.

So, how to take vitamin C to truly achieve the whitening effect? The answer is - internal administration is more effective than external application. Generally speaking, the amount of vitamin C that normal people consume every day through a reasonable diet is sufficient, and there is no need to add additional vitamin C. Excessive intake can pose health risks. Whitening, vitamin C plays an indirect role

Vitamin C is not only an indispensable component of the human body, but also has the effects of enhancing resistance, whitening and beautifying. Why can vitamin C whiten? Strictly speaking, it is not vitamin C that makes skin whiter.

In terms of whitening effect, vitamin C actually plays an indirect role in adding fuel to the flames. On the one hand, skin color depends on melanin in the skin, the root of which is tyrosinase. Vitamin C can inhibit the activity of tyrosinase, reduce melanin production, and at the same time remove free radicals and reduce skin damage from ultraviolet rays. . Therefore, it also has the effect of improving skin dullness.

In addition, vitamin C can also promote the production of collagen. The dermis of the skin contains a large amount of collagen, which is where the moist, shiny and elastic skin comes from. However, collagen will be affected by oxidation and change. At this time, the vitamin C in the tissue will act as an antioxidant and antioxidant. The effect of aging can inhibit the formation of pigment spots to a certain extent. It is best to apply it externally and take it internally

As we all know, melons and fruits are rich in vitamins, and many beauty-loving women diligently apply melon and fruit masks on their faces in order to achieve whitening effects through external application. Some women also take a two-pronged approach, applying external and internal medicine at the same time. Are they still worried that the whitening effect will not be achieved at their fingertips?

Vitamin C really cannot be applied externally or taken internally to get twice the result with half the effort.

In fact, ordinary vitamin C cannot be absorbed by the skin. Due to the "brick wall structure" of the skin, the epidermis forms a strong anti-lock, which is actually an important barrier function to maintain skin health. For normal people's skin, it is generally difficult for vitamin C to break through this barrier and be directly absorbed by the skin. Therefore, it is difficult to act from the outside.

If you want vitamin C to promote the body's whitening function, it is best to start with "eating". Dong Xiuqin suggested that the daily intake of vitamin C is best obtained from fruits and vegetables. As long as it is a balanced diet, it can basically meet the needs of the body, and there is no need to add additional vitamin C.

But for people who are under the influence of negative emotions such as stress, tension, insomnia, etc., because these emotions will cause the body to produce too many free radicals, more vitamin C is needed to "capture and remove them" ", you can appropriately increase your vitamin C intake. In addition, people who usually consume less vegetables and fruits or have irregular meals and have unbalanced nutrition can also take medicines containing vitamin C under the guidance of a doctor. Do you have any of these misunderstandings?

Since vitamin C is widely present in our food and the price of vitamin C supplements on the market is low, using it for beauty seems to be an easy thing. At present, many people have misunderstandings about vitamin C whitening and use. If it is used for a long time or excessively, it is a threat to health.

Myth 1: You can whiten your skin by eating more fresh fruits and vegetables rich in vitamin C

How much role vitamin C can play depends on each person’s digestion and absorption ability, so it can also be said It varies from person to person. It does not mean that the more you eat, the more you will absorb. Everyone has their own absorption rate, and excess vitamin C will be metabolized in the body into oxalic acid, or combined with sulfuric acid to form ascorbic acid-2-sulfate, which is excreted in the urine; The other part can be excreted directly from the body through urine.

It is worth noting that many fruits, such as oranges, kiwis, lemons, etc., are rich in vitamin C. Although vitamin C is widely present in vegetables and fruits, it is also an unstable water-soluble antioxidant, has a short shelf life and is easily oxidized.

For example, green leafy vegetables begin to lose vitamin C two hours after they are picked, and more than half of it is lost in half a day. At the same time, heating will also accelerate the loss of vitamin C. For example, stir-fried vegetables will not have much vitamin C left. Therefore, for the absorption of vitamin C, a sufficient amount must be taken every day to play a certain role.

Myth 2: Taking vitamin C tablets for a long time can have a better whitening effect

The intake of vitamin C is limited. Since vitamin C is an acidic substance, taking it in large amounts can cause diarrhea, hyperacidity, gastric reflux, etc., and should not be used by patients with stomach problems. Long-term consumption of large amounts will also cause a significant increase in urinary oxalate and urate, which can easily lead to the formation of kidney stones. It is recommended that adults consume 50-60 mg of vitamin C with each meal.

Myth 3: Vitamin C can make skin whiter

It needs to be emphasized that vitamin C does not have a whitening effect, but inhibits the formation of melanin. Therefore, at best, the skin color can be restored to normal. If your skin color is dark, no matter how much vitamin C you take, it will not make your skin whiter.