Peptide
Tetrapeptide-21
A synthetic peptide used in anti-aging formulas, studied for supporting skin firmness and a smoother-looking texture.
peptideanti-agingfirming
✓ Safe
Comedogenic Rating
0/5
Irritation Potential
0/5
What is it?
Tetrapeptide-21 is a synthetic signal peptide used in cosmetics for its studied role in supporting collagen-related processes and overall skin resilience.
Used in anti-aging serums and creams targeting fine lines, firmness, and texture.
Key Benefits
Firming support
Studied for a potential role in supporting skin firmness.
Texture smoothing
Contributes to a smoother-looking skin surface with consistent use.
Suitable for
Main Actions
When it may be insufficient
As with most cosmetic peptides, real-world topical penetration and effect size are modest compared to in-vitro study claims.
CategoryPeptides
Frequently Asked Questions
What does Tetrapeptide-21 do for skin?
Used in anti-aging serums and creams targeting fine lines, firmness, and texture.
Who should use Tetrapeptide-21?
Tetrapeptide-21 is suitable for: mature skin seeking anti-aging support.
Are there any warnings about Tetrapeptide-21?
As with most cosmetic peptides, real-world topical penetration and effect size are modest compared to in-vitro study claims.
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