Octapeptide-7

Octapeptide-7 is a short-chain peptide—a molecule composed of just seven amino acids linked together. Peptides are fragments of proteins, and in skincare, they function as signalling molecules that communicate with skin cells to support various biological processes.This ingredient is classified as a skin protectant, meaning it is intended to help maintain and reinforce the skin's barrier function. The skin barrier is the outermost layer that shields deeper skin layers from environmental stressors and helps prevent moisture loss.

Octapeptide-7 works as a signalling peptide, which means it communicates with skin cells to trigger protective responses. When applied topically, it is thought to stimulate skin cells to strengthen and maintain the structural proteins that form the barrier.The skin barrier comprises lipids, proteins, and dead skin cells arranged in a brick-and-mortar structure. By supporting this architecture, peptides like octapeptide-7 may help reduce transepidermal water loss and improve resilience against external stressors.

Octapeptide-7 is typically found in serums, moisturisers, and protective creams. As with most peptide products, consistent daily use is recommended to observe benefits over several weeks. Layer it with complementary ingredients like ceramides or niacinamide to optimise barrier support.

Octapeptide-7 is generally well-tolerated and suitable for most skin types. As with any new ingredient, patch test first if you have sensitive or reactive skin.