Abstract:

Human beings cannot avoid contact with UV rays in their daily lives, and the skin problems caused by UV radiation have become a common problem for people, which leads to a daily demand of the cosmetics claimed after-sun repair effect. The Cosmetics Efficacy Claim Evaluation Code requires that cosmetics with repair efficacy should be evaluated by the means of human efficacy evaluation tests for efficacy claims. In order to improve the research on the evaluation methods of cosmetic after-sun repair efficacy, and to meet the market demand for after-sun repair products from consumers, we provide research on the efficacy evaluation methods of after-sun repair cosmetics, and establish the basis for the establishment of an efficacy evaluation system for after-sun repair cosmetics. It briefly discusses the action mechanism of ultraviolet light on skin and after-sun performance, the action mechanism of after-sun repair products, the definition of repair efficacy and the regulatory requirements for the efficacy claims of repair cosmetics, the methods and research progress of clinical trials and in vitro tests on the efficacy of after-sun repair cosmetics （among which in vitro tests are divided into cell tests and animal tests）, and provides an outlook on the establishment of an evaluation system for the efficacy of after-sun repair cosmetics.

Key words: cosmetic, post-sun repair, efficacy evaluation