CAUTION: Skincare products claiming to be designed for a specific age group, or for "mature" skin (usually referring to women over 50), are formulated with the same ingredients as all OTC moisturizers. There is no specific ingredient that can be added to a moisturizer to make that moisturizer more effective based on age. This marketing ploy makes absolutely no sense. 35 year olds can absolutely use the same moisturizers as 50 year olds, and 50 year olds can use the same products as 80 year olds!
Age should not determine which moisturizer you use. Choosing any skincare product based on your age is not a wise way to shop.