Phenylalanine ●
TL;DR. This ingredient functions mainly as a skin and hair conditioning amino acid, helping support hydration feel and formula softness. It is often used in amino acid blends aimed at barrier-support and moisturization claims.
What does Phenylalanine do in a cosmetic formula?
This ingredient functions mainly as a skin and hair conditioning amino acid, helping support hydration feel and formula softness. It is often used in amino acid blends aimed at barrier-support and moisturization claims.
Is Phenylalanine clean?
From a clean beauty perspective, it is generally well tolerated and not a common restricted-list concern. Sensitization potential is low, and it does not carry the allergen profile associated with fragrance materials or reactive preservatives.
Is Phenylalanine sustainable?
This material is commonly produced by fermentation from plant-derived sugars, though sourcing should be verified by supplier documentation. It is expected to be readily biodegradable and does not raise persistence or bioaccumulation concerns.
Is Phenylalanine COSMOS-approved?
It can align with COSMOS-natural and COSMOS-organic when sourced by accepted natural or fermentation routes and documented accordingly. Its fit with Green Chemistry is strong when made from renewable feedstocks through aqueous fermentation with biodegradable outputs.
How does Phenylalanine work chemically?
The molecule is a zwitterionic alpha-amino acid with a hydrophobic aromatic side chain, an isoelectric point around pH 5.5, and good compatibility across typical cosmetic pH ranges. Use levels are usually low, often about 0.01% to 1% in leave-on formulas, and it is commonly paired with other amino acids, humectants, and barrier-support ingredients.
Last updated 2026-05-13