What it is
Serine is a naturally occurring amino acid and a component of skin's natural moisturizing factor. In cosmetics it is used as a humectant and skin-conditioning agent that helps attract and hold water for a softer, more hydrated feel. It is frequently included as part of amino acid blends in moisturizers, serums, and sunscreens.
Safety & warnings
Serine is an amino acid native to skin and is generally very well tolerated, with low irritation and sensitization potential. It is not a known fragrance allergen and is not associated with comedogenicity.
Origin & sourcing
Can be produced synthetically or by fermentation; the same amino acid also occurs naturally in skin and many proteins.
Questions everyone asks
What is serine used for in skincare?
It is used as a humectant and skin-conditioning amino acid that helps the skin attract and retain moisture.
Is serine gentle on skin?
Yes, as an amino acid naturally found in skin, it is generally very well tolerated with low irritation potential.