半乳糖是一种单糖，是葡萄糖的C4异构体，是乳糖在肠道中水解的产物之一。在化妆品中作多方面的皮肤调理剂使用。 Monice M. Fiume,Wilma F. Bergfeld,Donald V. Belsito,Ronald A. Hill,Curtis D. Klaassen,Daniel C. Liebler,James G. Marks,Ronald C. Shank,Thomas J. Slaga,Paul W. Snyder,Lillian J. Gill,Bart Heldreth. Safety Assessment of Monosaccharides, Disaccharides, and Related Ingredients as Used in Cosmetics[J]. International Journal of Toxicology,2019,38(1_suppl).