Modern scientific research finds out that, the degree of skin delicacy and smoothness is closely related with the content of in the dermis. Hyaluronidase can promote the absorption of water, trace elements, vitamins and other nutrients of the skin, so that to make the skin moist, delicate and smooth. Then, how to make the skin healthy from diets? 

First of all, drink water appropriately.
The content of water accounts for 72% in human tissue fluid. When the water content decreases in the body, the skin will become dry, and the secretion of sebaceous glands will be reduced, so the skin will lose its elasticity, and the wrinkles will appear. To ensure the water intake, women should drink about 1200 milliliters of water every day.

Secondly, eat more foods rich in vitamins.
Vitamins play an important role in preventing skin aging and keeping the skin delicate and moist. Japanese researchers have found out that, vitamin E can destroy the chemical activity of free radicals, thereby inhibiting skin aging. What's more, vitamin E also has the effect of preventing the deposition of lipofuscin on the skin. In addition, vitamin A and vitamin B2 are also indispensable nutrients for the smoothness and delicacy of the skin. When human body lacks of vitamin A, the skin will become dry and rough; while the lack of vitamin B2 will lead to skin cracking, desquamation and pigmentation.

Thirdly, eat more foods containing .
If you want to make the skin shiny and ruddy, you need an adequate blood supply. Iron is one of the major components of heme in the blood. As a result, you should eat more foods rich in iron, such as animal liver, egg yolk, kelp, seaweed and so on.

Fourthly, increase the intake of foods rich in s and elastins.
Collagen can make the cells become plump, thereby reducing the wrinkles on the skin. Elastin can increase the elasticity of the skin, so as to make it smooth and elastic. Foods rich in collagens and elastins include pig trotter, animal tendon, and so on.

Last but not the least, pay attention to take in more alkaline foods.
A lot of foods in daily diet are acidic in nature, such as fish, meat, poultry, eggs, etc. Acidic foods may increase the level of lactic acid and uric acid in the body fluid and in the blood. When the organic acids can not be promptly eliminated out from the body, they will erode the sensitive epidermis cells, making the skin lose its delicacy and elasticity. In order to neutralize the acid composition in the body, you should eat some alkaline foods, such as apple, pear, citrus, and so on.