L-Lysine ●
TL;DR. This ingredient is used mainly as a pH adjuster and buffering aid, with secondary humectant and conditioning effects in skin and hair formulas.
What does L-Lysine do in a cosmetic formula?
This ingredient is used mainly as a pH adjuster and buffering aid, with secondary humectant and conditioning effects in skin and hair formulas.
Is L-Lysine clean?
From a clean-beauty perspective, this ingredient is generally well-tolerated, low-sensitizing, and not a common restricted-list concern. It is a familiar skin-compatible building block rather than a high-controversy additive.
Is L-Lysine sustainable?
It is commonly made by microbial fermentation of plant-derived sugars, often from corn or sugarcane, rather than direct petrochemical synthesis. It is readily biodegradable and not expected to persist or bioaccumulate in water systems.
Is L-Lysine COSMOS-approved?
It can align with COSMOS-natural and COSMOS-organic formulas when produced by approved fermentation or other compliant processes. Its renewable feedstock potential, biodegradability, and low-use functional role fit well with Green Chemistry principles.
How does L-Lysine work chemically?
This molecule is a basic, water-soluble essential amino acid with two amine groups and one carboxyl group, giving it cationic character at typical skin-care pH. Typical use is low, often below 1%, as a pH adjuster, buffering aid, humectant, or conditioning support, and it is most stable in aqueous systems away from strong oxidizers.
Last updated 2026-05-13