Pal-KTTKS is Palmitoyl pentapeptide-4. It is composed of the amino acids lysine, threonine, lysine and serine. It is demonstrated to stimulate the production of collagen I, III, and IV.

Pal-KTTKS是棕榈酰五肽-4。它由氨基酸赖氨酸，苏氨酸，赖氨酸和丝氨酸组成。它被证明可以刺激胶原蛋白I，III和IV的生成。