Medically reviewed by Kristie Reed, PharmD Glycerin's humectant properties help skincare, soap, eye drops, and cosmetics retain moisture.Using glycerin may help relieve dry eyes and ...

Humectants are substances that attract and retain water molecules, keeping things moist and hydrated by drawing moisture from the air or from deeper layers of the skin. They are often added to skin ...

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 ...