Background/Objectives: Exogenous melatonin adsorbed onto PEG microspheres can modulate the functional activity of phagocytes in colostrum. but no data are available on the activity of melatonin found in colostrum. Therefore. the objective of this study was to extract melatonin from human colostrum. https://cosmeticssquadets.shop/product-category/stretch-mark-treatment/