Cosmetic peptide
Acetyl Tetrapeptide-2
A cosmetic peptide with in vitro evidence of altered keratinocyte mechanics and structural-gene expression. Reliable human anti-ageing evidence is limited.
Evidence confidence
Human
Not yet assessed
Trust Engine review pending.
Animal
Not yet assessed
Trust Engine review pending.
Mechanistic
2/5
Some mechanistic research
1 citation
Safety
Not yet assessed
Trust Engine review pending.
Claimed uses
- Insufficient
Mechanisms
- not-yet-documented
- Keratinocyte mechanics and structural-protein modulation
Safety notes
Ingredient-specific long-term safety data are limited. Cell-culture effects do not establish benefit or safety at high concentrations.
Regulation
- Cosmetic ingredient; not an approved medicine.
References
Last reviewed
11 July 2026