Proline ●
TL;DR. This ingredient functions mainly as a humectant and skin-conditioning amino acid, helping bind water and support a smoother skin feel. It is also used in hair care for light conditioning and moisture balance.
What does Proline do in a cosmetic formula?
This ingredient functions mainly as a humectant and skin-conditioning amino acid, helping bind water and support a smoother skin feel. It is also used in hair care for light conditioning and moisture balance.
Is Proline clean?
It is generally well tolerated, not a common fragrance allergen, and has no major clean-standard restricted-list friction. Sensitivity is uncommon at typical cosmetic levels.
Is Proline sustainable?
This material is commonly made by fermentation or protein hydrolysis and is readily biodegradable. Its sustainability profile is strongest when sourced from renewable feedstocks with transparent fermentation inputs.
Is Proline COSMOS-approved?
It is permitted in COSMOS-natural and COSMOS-organic formulas when produced from approved natural, fermentation, or biotechnology routes. It aligns well with Green Chemistry through biodegradability, low use levels, and potential renewable sourcing.
How does Proline work chemically?
This compound is a cyclic alpha-amino acid that is zwitterionic near skin pH, with an isoelectric point around pH 6.3. Typical cosmetic use is often about 0.1% to 2%, and it is water soluble, heat stable in normal processing, and compatible with humectants, peptides, and mild surfactant systems.
Last updated 2026-05-13