Evidence check: Progesteron in the context of skin aging

Claims that progesterone slows skin aging are based mainly on animal studies, small observational trials, and marketing for anti-aging creams. No large randomized controlled trials in humans demonstrate clear benefit. Progesterone can be absorbed through the skin, but systemic effects are uncertain and may carry hormonal risks. The evidence is best classified as 'unclear' or 'marketing'. Consumers should not rely solely on such tests or products and should consult a physician before using hormonal preparations.