What is the function of glycerin in skin care?

Glycerin serves as a humectant in skin care products, which means its primary function is to attract and retain moisture in the skin. This is particularly important for maintaining skin hydration, as glycerin draws water from both the environment and deeper layers of the skin into the outer layer, resulting in improved skin moisture content. This characteristic not only helps to keep the skin feeling soft and supple but also aids in the overall health and appearance of the skin.

By enhancing the moisture content, glycerin can also help in strengthening the skin barrier, making it more resilient against environmental stressors. This moisture-retaining property makes glycerin a key ingredient in various formulations, especially for individuals with dry or dehydrated skin conditions.

Other functions listed, such as exfoliating the skin, lightening hyperpigmentation, or providing sun protection, are performed by different types of ingredients and do not relate to glycerin's specific role in skin care. Exfoliation is typically achieved through ingredients like alpha and beta hydroxy acids, while skin lightening agents often include compounds such as hydroquinone or vitamin C. Sun protection is provided by substances like zinc oxide or titanium dioxide. Thus, glycerin uniquely contributes to hydration, making it an essential component in many skin