Glycerin is a sugar alcohol that can be obtained from animal and plant sources and also produced synthetically. In the body, but especially in the skin, it occurs as a natural moisturizing factor (NMF). Glycerin can attract and bind moisture from its surroundings.

Skincare products containing glycerin moisturize the skin and help maintain its natural moisture barrier. This makes the skin softer and more supple and helps protect it from drying out.