Tetrapeptide-21 ●
TL;DR. This ingredient is a skin-conditioning signal ingredient used in anti-aging products to support the appearance of smoother, firmer skin. It is typically included at very low levels in serums, creams, and eye products.
What does Tetrapeptide-21 do in a cosmetic formula?
This ingredient is a skin-conditioning signal ingredient used in anti-aging products to support the appearance of smoother, firmer skin. It is typically included at very low levels in serums, creams, and eye products.
Is Tetrapeptide-21 clean?
From a clean-beauty perspective, it is generally well tolerated and is not a common fragrance allergen or preservative concern. The main friction is its synthetic manufacture and limited alignment with strict natural-origin standards.
Is Tetrapeptide-21 sustainable?
This material is made from amino-acid building blocks through controlled synthesis, often followed by purification steps. It is expected to break down more readily than persistent silicones or fluorinated materials, but conventional production can be solvent and reagent intensive.
Is Tetrapeptide-21 COSMOS-approved?
It is not typically aligned with COSMOS-organic or COSMOS-natural standards unless a supplier has specific documentation showing compliance. Its Green Chemistry profile is mixed, with low-use efficacy and biodegradable building blocks balanced against synthesis and purification demands.
How does Tetrapeptide-21 work chemically?
The molecule is a short chain of four amino acids designed to interact with skin-signaling pathways rather than act as an occlusive or exfoliant. It is usually supplied in dilute aqueous or glycerin-based blends, used at low active levels, and formulated in mild pH systems where amino-acid chains are more stable.
Last updated 2026-05-13