How to get a full tan

1, basking in the sun

As we all know, the sun can turn black. But if exposed to the sun, it will lead to skin lesions and cause diseases. Therefore, you can't rush for success. You can rub some sunscreen before drying, which can not only block harmful ingredients, but also promote skin blackening, killing two birds with one stone.

2, diet conditioning

The synthesis of melanin is inseparable from the function of complex acid. Therefore, eating more foods rich in complex acids will help you tan yourself quickly. So, how is tyrosine supplemented? Tyrosine supplement is obtained through daily diet. It is suggested that friends eat more foods rich in tyrosine and minerals, such as lean meat, eggs, animal offal, milk, novel vegetables, beans, peanuts, black sesame seeds, walnuts and so on.

The opposite effect of arginine is the intake of vitamin C, which has whitening effect and should be reduced. Foods rich in vitamin C include fresh jujube, hawthorn, cherry, kiwi fruit, grapefruit and so on.

3. Artificial tanning

If life time can't satisfy your natural sunbathing, you can also try to use purple light at home and pay attention to sun protection.

How can I get a tan?

1. You can sunbathe and get a tan.

2. Sunbathing refers to an exercise that makes the sun shine on the human body according to a certain method, causing a series of physiological and biochemical reactions, exposing the skin to ultraviolet rays of the sun and blackening the skin melanin, also known as tanning.

The earliest origin of tanning is just like its name "tanning"-sunbathing. Tanning appeared in the west in the middle of last century, representing a sunbathing culture of Europeans and Americans-enjoying the sunshine. Suntan and vacation are directly linked, and vacation cannot be separated from sunny beaches. Suntan has almost become a status symbol. People with bronzed skin show that they often go to sunny and expensive resorts to bask in the sun, so "dark skin" is the best business card to show their identity.

How does the sun tan?

How does the sun tan?

How does the sun tan? Summer has come quietly and the weather is getting hotter and hotter. At this time, we should pay special attention to the sunscreen work of the skin. Especially the face, because the face skin is fragile, let's see how the sun is tanned.

How does the sun shine 1

First of all, sunlight can cause the skin to turn black:

1, China people's melanin contains a lot of natural vitamin A in the form of carotene, so the skin will appear slightly yellow. Although the crystalline keratin in the granular layer of skin epidermis can refract sunlight and greatly reduce the penetration of ultraviolet rays, once a small part of ultraviolet rays enter the skin, it is enough to stimulate the formation of melanin.

2. If you stay in the sun for a long time, the crystallized keratin will be destroyed, which will not prevent the ultraviolet rays from directly shining on the basal layer, so that the melanin secreted by the pigment mother cells will float on the epidermis and the skin color will turn black.

3. When excess melanin accumulates, dirt in the skin is blocked, and melanin can't be metabolized and discharged normally, it will form black spots and freckles.

So, if there were only three or five black spots on the face, but in summer, the black spots actually expanded into pieces because of exposure.

Therefore, it is an important procedure for us to use sunscreen products in the sun and take adequate sunscreen measures to protect our skin.

Second, the sun matters needing attention:

1, from 6 am to 10 is the most suitable for sunbathing. At this time, the infrared rays in the sun are strong and the ultraviolet rays are weak, which can play the role of promoting blood circulation and removing blood stasis; 4 pm to 5 pm is also the best time to bask in the sun, which can promote the absorption of calcium and phosphorus in the intestine, enhance physical fitness and promote normal calcification of bones. However, the sunshine time is longer in summer, and the heat wave is rolling at 4-5 pm, so the sunshine time can be slightly delayed.

2. Generally speaking, people with fair skin can meet the demand of vitamin D production by sunbathing for 3-4 times a week10-20 minutes each time. If you want to synthesize vitamin D artificially, you'd better choose to bask in the sun from 10 to 2 pm. When the weather is very hot, sunbathing for 5~ 10 minutes at a time is enough.

It should be reminded that although sunbathing is beneficial to physical and mental health, you should not choose to sunbathe for nearly three or two hours at noon. Absorbing a small amount of sunlight can "nourish the body and nourish the spirit", which makes people healthy and energetic, while consuming too much energy and worrying about skin cancer.

4, too much exposure can easily turn the body's cockroaches into melanoma or skin cancer. When you are in the sun, you must wear a sunscreen to cover the mole.

Some people think that you can achieve the same effect through glass. In fact, if you bask in the sun through the glass, the ultraviolet transmittance will be less than 50%, and the absorption effect will be greatly reduced.

How does the sun tan?

Under the irradiation of sunlight, a large amount of melanin pigment will be produced, which will make the skin black.

1, the color of human skin varies from milky white to chocolate black, and these different colors are mainly inherited and influenced by acquired factors, but the most important determinant is the melanin contained in the body.

2. There are two kinds of melanin, one is dark brown melanin and the other is yellow orange melanin. The skin color of a person is determined by the proportion of these ingredients. The cause of tanning is related to melanin.

3. Sunlight includes visible light, infrared light, ultraviolet light and so on. Solar rays reaching the earth are divided into short-wave ultraviolet rays, long-wave infrared rays and visible light. Among ultraviolet rays, UVA and UVB can reach the ground except short-wave UVC, which has a lot of influence on people's lives.

Extended data

Reasons for the formation of spots:

The reason for tanning is that when ultraviolet rays reach the basal layer of the skin, melanin will be produced. Usually, after a few months, the pigmentation will become less obvious, but spots will appear due to the damage and accumulation of cells by ultraviolet rays.

0 1, UVB in ultraviolet rays can reach the basal layer of skin, and the basal layer cells will produce melanin through pigment cells in order to defend against ultraviolet rays.

02. When melanin is deposited in basal cells, the skin color will become dark and brown.

03. Cells destroyed by ultraviolet rays accumulate in the basal layer, and even without UVB, they will continue to produce melanin, which is called spots.

How does the sun tan?

Before answering this question, let's look at the characteristics of human skin color. According to different skin colors, human beings are roughly divided into white race, black race, yellow race and brown race. Excluding immigration and other factors, we will find that this difference in skin color distribution is mainly affected by geographical environment, especially lighting. For example, the light in Africa near the equator is strong, and almost all the residents there are dark; In areas with high latitudes and insufficient light, whites have an absolute advantage. Obviously, light and skin color are closely related.

So, how does the skin turn black under the action of ultraviolet rays? In the deep epidermis of skin, there are famous melanocytes. Melanocytes can produce melanosome and enter other cells in the epidermis. Melanin contains a lot of melanin, and the depth of skin color is determined by the amount of melanin. When ultraviolet rays in sunlight enter the skin, melanocytes can keenly perceive that "uninvited guests" are coming.

In order to protect themselves from the excessive damage of ultraviolet rays, melanocytes began to work overtime to produce melanosome, and these melanosome quickly distributed in the epidermis. These melanosome are like countless tiny umbrellas, blocking the ultraviolet rays in the sun. In this way, from the appearance, people will find that the skin color exposed to the sun has deepened. In short, dark skin can absorb and scatter ultraviolet rays and prevent ultraviolet rays from damaging deeper tissues.

Therefore, the phenomenon of skin blackening after sunlight exposure is actually a physiological reaction of skin to resist ultraviolet damage and protect itself. White skin is relatively deficient in melanin, so it is most vulnerable to ultraviolet rays. So white people are more likely to get skin cancer than other races.

This is all about sunbathing. Now you know something about sunbathing, just like we usually sunbathe. We don't have to worry about this problem, as long as we pay attention to applying sunscreen to protect our skin and eat more fruits and vegetables before sunbathing, it will still change back.