What ingredient is commonly used to hydrate the skin?

Hyaluronic acid is widely recognized as a key ingredient for hydrating the skin, primarily because of its unique ability to attract and retain moisture. This naturally occurring substance holds up to 1,000 times its weight in water, making it exceptionally effective in helping to keep the skin plump and hydrated. This property is particularly valuable in skincare formulations, especially for individuals with dry or dehydrated skin, as it aids in maintaining the skin's moisture balance.

In contrast, salicylic acid is primarily known for its exfoliating properties and is commonly used to treat acne by unclogging pores. Retinol, a derivative of vitamin A, is mainly utilized for its anti-aging benefits, promoting cell turnover and enhancing skin texture. Glycolic acid, an alpha hydroxy acid, is primarily an exfoliant that helps improve skin texture and tone by sloughing off dead skin cells, rather than focusing on hydration. These distinctions highlight why hyaluronic acid is the preferred choice for skin hydration purposes.