What it is
Sarcosine is N-methylglycine, a naturally occurring amino acid intermediate found in the body. In cosmetics it functions as a skin-conditioning humectant and also serves as the basis for the sarcosinate family of mild surfactants used in cleansers. In sun care and skincare it contributes to the conditioning and feel of the formula.
Safety & warnings
Generally regarded as well tolerated at cosmetic use levels. It is not a recognized fragrance allergen and is non-comedogenic. As with any ingredient, irritation is possible in highly sensitive individuals.
Origin & sourcing
Manufactured synthetically for cosmetic use; sarcosine also occurs naturally as a normal intermediate of amino acid metabolism.
Questions everyone asks
Is sarcosine related to glycine?
Yes. Sarcosine is N-methylglycine, essentially glycine with an added methyl group, and it occurs naturally in the body as an amino acid intermediate.
What is sarcosine used for in cosmetics?
It acts as a skin-conditioning humectant and is also the starting material for mild sarcosinate surfactants used in cleansing products.