What it is
Alanine is one of the simplest amino acids and occurs naturally as a component of the skin's natural moisturizing factor. In cosmetics it is used as a water-soluble skin-conditioning agent and humectant that helps support hydration, and it can also contribute to buffering. It appears at low levels in many sunscreens and hydrating products, often alongside other amino acids.
Safety & warnings
Alanine is a naturally occurring amino acid that is generally very well tolerated, non-sensitizing, and not associated with comedogenicity. It is not a recognized fragrance allergen.
Origin & sourcing
Available in both naturally occurring (commonly fermentation-derived) and synthetic forms; cosmetic grades are typically produced by fermentation or chemical synthesis.
Questions everyone asks
What does alanine do in skin care?
It works as a skin-conditioning agent and humectant, supporting hydration as part of the skin's natural moisturizing factor, and can also help buffer a formula.
Is alanine irritating to skin?
Alanine is a naturally occurring amino acid that is generally very well tolerated and is not a known irritant or allergen.