Humectants are substances that attract water. In personal care products, they help hydrate the skin, hair, or nails. Hyaluronic acid and glycerin are examples of humectants. Humectants are different ...

If you pass someone on the street who has dewy skin, they likely drink a lot of water, get a lot of sleep — and slather their skin with humectants. This category of skin care ingredients is one of the ...