What Do Peptides Actually Do in Skincare?
“Peptide” does not describe one ingredient or one effect. Peptides are short chains of amino acids, and different peptides are designed to perform different roles.
Researchers commonly divide cosmetic peptides into groups including signal peptides, carrier peptides, neurotransmitter-inhibiting peptides and enzyme-inhibiting peptides.
Are peptides proven?
Some individual peptides have human clinical evidence.
For example, Palmitoyl Pentapeptide has been evaluated in a randomized split-face study and was associated with improvements in fine lines compared with the control formulation.
But that does not mean every peptide, or every peptide cream, will produce the same result.
A recent systematic review found encouraging but mixed evidence across peptide interventions, with differences depending on the peptide, delivery method and study design.
Which peptides are in Breeze & Be?
The Probiotic Day Cream contains Acetyl Hexapeptide-8 and Palmitoyl Pentapeptide-4.
The Exosome Serum contains Myristoyl Pentapeptide-4 and Dipeptide Diaminobutyroyl Benzylamide Diacetate, alongside hyaluronic acid and soluble collagen.
Dr. Roy’s take:
Don’t buy a product because the front says “peptides.” Ask which peptides are actually inside—and what evidence exists for them.
References
- Gorouhi & Maibach. Role of topical peptides in aged skin. PMID 19570099.
- Robinson et al. Topical palmitoyl pentapeptide in photoaged facial skin. PMID 18492182.
- Alsaif et al. Oral and topical peptides for skin aging: systematic review. PMID 41924746.
