After oral administration/application of collagen, the face is not only firm and delicate, but also brightens the complexion and improves the dullness of the face after staying up late, with emphasis on anti-aging and anti-wrinkle.

Interpretation of the truth:

Oral administration/application of collagen is very popular in recent years, claiming that after use, the skin is not only firm and delicate, but also brightens the skin after staying up late and improves facial dullness. The emphasis is on anti-aging and anti-wrinkle. Is that really the case?

The manifestations of skin aging are increased wrinkles, pigment deposition, skin thinning, decreased water content in epidermis and decreased elasticity. Skin aging is caused by many internal and external factors, and the reduction of collagen is only one of many factors of skin aging.

Can these collagen lost from the skin be supplemented by oral administration or smearing? The answer is no.

First of all, look at oral collagen: the ingested collagen cannot be directly absorbed by the human body, but is decomposed into tiny amino acids by digestive juice in the intestine before being absorbed by the intestine. After these amino acids enter the human body, their whereabouts are unknown, and they will be randomly transported to various organs and tissues, and only a small part will be transported to the skin. In other words, eating collagen is the same as eating eggs, and finally it is decomposed into the same thing (amino acid) in the intestine, and only a small part is given to the skin after being absorbed by the human body. Therefore, oral administration of collagen can not achieve the effect of "what to eat and what to make up".

Let's look at the application of collagen: collagen is a macromolecular substance. As the largest organ of human body, the main function of skin is barrier function. With such a large molecular weight, it is impossible for collagen to penetrate the skin and enter the human body. It will only stay on the surface of the skin and be washed away by water the next time you wash your face. Therefore, applying collagen is equivalent to applying face oil, which has only a short-term moisturizing effect and will not significantly improve skin quality.

Rumor expert: Attending physician of Tongren Hospital affiliated to Chen Xue Capital Medical University.

Expert: Chief researcher of plastic surgery, First Affiliated Hospital of Zhengzhou University, Liu Ling.