Creatine Best Humectant Hydration Creatine at a glance Amino acid found in the human body Serves as a precursor to adenosine triphosphate Improves the appearance of fine lines and wrinkles Boosts skin firmness Creatine description Creatine is an amino acid found in the human body and most types of meat and fish. This ingredient serves as the precursor to adenosine triphosphate, a skin-restoring and soothing agent. Creatine is located mostly in the body’s muscles and in the brain. Studies have shown that topically applied creatine can improve the appearance of fine lines and wrinkles. Additional studies have demonstrated that topical creatine can boost skin firmness. This amino acid may be animal-derived or synthetic; Paula’s Choice Skin care uses the latter. Typical usage levels of this concentrated ingredient in skin and hair care range from 0.5–1.4%. As a naturally occurring amino acid, it is considered safe as used in cosmetics. Related ingredients: Adenosine Triphosphate Skin-Restoring Ingredients