How it works: Upon application, Pal-KTTKS is carried into the skin and stimulates the production of collagen, glycosaminoglycans (GAGs), and fibronectin (all important parts of healthy, smooth skin).

Effectiveness: A study of over 200 women showed that Pal-KTTKS decreased the appearance of facial lines and wrinkles and that people who used the product noticed improvements in the appearance of age spots, dark circles under the eyes, and skin firmness. A second study showed biopsy proof of improvements in wrinkle depth, skin density, and overall roughness. Products containing Pal-KTTKS are generally well tolerated.

Where to find it: TYK, Strivectin, Olay Regenerist

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