Acetyl Tetrapeptide-9

Acetyl Tetrapeptide-9 is a synthetically-made peptide from the group of signal peptides. It consists of four amino acids (glutamine, aspartic acid, valine, and histidine) with an acetyl group on one end.

It is an anti-aging and anti-wrinkle ingredient which, according to a small clinical study, increases the formation of collagen and other structural proteins in the skin. This results in firmer and thicker skin (these two parameters were significantly improved in the study), which reflects as more youthful skin on the outside, with more structural integrity and fewer wrinkles.

Like all small peptides, it is also humectant moisturizing, helping to retain water to the top layers of the skin.