Ingredient · INCI listed
Tetrapeptide 21
A signal peptide studied to support collagen production and the look of firmness. A gentle, lightly evidenced anti-aging peptide.
Data summary
Products containing
2
Most common in
1 product
eye creams
Typical pairing
Bakuchiol
Verified reviewer
In the catalog
Tetrapeptide 21 by the numbers.
The DermFND database tracks 2 products formulated with tetrapeptide 21, and it's strongly concentrated in eye creams — 1 product, 50% of where it shows up. Formulations carrying it score 79/100 on average (well above the catalog norm); the strongest is Dr. Dennis Gross Skincare Advanced Retinol + Ferulic Triple Correction Eye Serum at 80/100.
It co-occurs most with Caffeine (1 shared formula) and Licorice Root Extract (1 shared formula).
Where it shows up
