Which ingredient is often used in moisturizers to hydrate the skin?

Hyaluronic acid is a powerful humectant, which means it has the ability to attract and retain moisture in the skin. It can hold up to 1,000 times its weight in water, making it exceptionally effective for providing hydration. When used in moisturizers, hyaluronic acid helps to plump up the skin, making it look dewy and youthful. This quality makes it a popular ingredient in skincare products aimed at both preventing and alleviating dryness.

In contrast, while retinol is beneficial for skin renewal and reducing the appearance of fine lines, it does not primarily function as a moisturizer. Glycolic acid is an exfoliant that helps to remove dead skin cells and improve skin texture but is not designed for hydration. Salicylic acid is mainly used for its ability to penetrate oily skin and treat acne; it can be drying, so it is often not considered a hydrating ingredient.