What Peptides Are
Peptides are short chains of amino acids that act as signaling molecules in skin. Different types, including signal peptides and carrier peptides, are studied for their roles in supporting collagen production and barrier function.
The Evidence
Peptide research is growing but less established than retinoid research. They are generally well-tolerated and can be a supportive addition to a routine, especially for those who cannot tolerate retinoids. They are not a replacement for sun protection.