Shulou(Shulou.com)11/24 Report--

This article comes from the official account of Wechat: SF Chinese (ID:kexuejiaodian), author: SF

In the 1990s, the audience of Friends wanted to change the hairstyle of the heroine Jennifer Jennifer Aniston. Recently, she recommended her daily morning drink to the public: coffee and a tablespoon of collagen. She claims that this formula can "rejuvenate" the skin. But is there any scientific basis for this?

Wen | Amy Arthur

Editor | Liu Jiayu

There has been a great controversy about the usefulness of collagen. Many beauty lovers are keen on various collagen supplements, and many people claim that oral collagen has no effect. What is the truth?

After the age of 30, the human body's ability to synthesize collagen decreases. Collagen can be said to be one of the most abundant proteins in the human body. This protein is found in our skin, hair and nails, as well as in connective tissue in cartilage, muscles and tendons. Studies have confirmed that collagen plays a role in relieving arthritis and repairing tendons and ligaments. In the laboratory, this protein can also be used as a medium for the cultivation of biological tissue.

In children and youth, the human body synthesizes the most collagen, but by the time it is nearing the age of 30, the body's ability to synthesize collagen begins to decline. In skin, collagen mainly comes from fibroblasts, which are easily damaged by sunlight and air pollution. Lack of collagen is thought to be the main cause of wrinkles. A study found that 80-year-olds synthesized 75% less collagen than young people.

Collagen supplements are slightly different from those made by the human body, but can collagen supplements reduce wrinkles and dark spots and make the skin tighter, as many people think? In theory, no matter what kind of collagen supplements, such as tablets, powders and hydrogel capsules, are slightly different from the collagen made by the human body.

The human body can not digest and absorb collagen from the outside world very well. So, in order to make supplements, manufacturers degrade collagen through a biochemical reaction called hydrolysis, turning them into small molecules that are easier to absorb.

In addition, some people are worried about the effect of temperature on protein molecules. Although high water temperature can damage the efficacy of collagen supplements, it requires a high temperature of at least 150 ℃, so it's okay to add collagen to your coffee.

The evidence is not enough to support the efficacy claimed by manufacturers and advocates, so do such collagen supplements work? A study of more than 1000 volunteers from 19 surveys found that collagen supplements did reduce signs of skin aging if taken continuously for more than 90 days.

But scientists believe that the sample size of each survey is small, so the conclusions are likely to be limited. It is also important to note that these surveys are usually fully or partially sponsored by companies that produce collagen supplements. Therefore, the final conclusion of the study is that the current evidence is not enough to support the efficacy claimed by producers and advocates.

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