| Summary: | With the improvement of people's living standards, cosmetics have been widely used. The addition of whitening ingredients in cosmetics is necessary. Natural whitening ingredients have the advantages of small side effects, strong efficacy and high safety, but excessive addition is harmful to the human body. Therefore, the detection of natural whitening ingredients in cosmetics is very important. This paper summarizes the research on natural whitening ingredients detection technology, and compares the advantages and disadvantages of high-performance liquid chromatography, pre-column/ post-column derivatization high performance liquid chromatography, thin layer chromatography and thin layer scanning method. We extract polyphenols from natural plants and thymine from natural animals as ingredients of cosmetics.
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