Cyclopeptide-161

Cyclopeptide-161 is a peptide—a short chain of amino acids—engineered in a cyclic structure. Peptides are fragments of proteins, the building blocks that give skin its strength and elasticity. This particular cyclopeptide has been incorporated into skincare formulations with the aim of supporting skin's structural integrity and resilience.As a peptide ingredient, Cyclopeptide-161 is designed to communicate with skin cells or provide structural support. Peptides typically function by signalling to fibroblasts (the cells responsible for collagen and elastin production) or by offering amino ac…

Cyclopeptide-161 operates through two potential mechanisms. First, as a signalling molecule, it may interact with skin fibroblasts to stimulate the production or retention of collagen and elastin—key proteins that decline with age. Second, the cyclic structure may enhance stability and skin penetration, allowing the peptide to deliver amino acids directly to areas where skin structure is compromised.The cyclic design (a ring-shaped peptide) is thought to offer greater resistance to breakdown compared to linear peptides, potentially allowing it to remain active within the skin for longer.

Cyclopeptide-161 is typically found in serums, creams, and moisturisers designed to address signs of ageing. Apply to clean skin before heavier creams or oils, as peptides tend to work best in lighter formulations. Consistency is important—peptide benefits generally emerge over weeks of regular use rather than immediate visible change.

Peptides are generally well-tolerated and rarely trigger irritation, making them suitable for sensitive skin. As with any ingredient, discontinue use if signs of irritation develop.