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doi: 10.1002/bit.25621

10.1071/rd08008 84 ZhaoL.ZongW.ZhangH.LiuR

Topical Serums and Creams Topical glutathione is difficult for the skin to absorb because the molecule is large and unstable

The aminotransferase, phosphoserine aminotransferase 1, utilizing glutamate as a donor, produces 3-phosphoserine, which is converted to serine by phosphoserine phosphatase
