Ingredient dictionary

Glycerin

Also listed as: Glycerol

Glycerin is a clear, thick, odorless liquid that pulls water into the skin and helps keep it hydrated. It is on the label of 971 products in our library. Checked against our library November 6, 2026.

What Glycerin does

Draws water into the outer skin layer
Helps skin feel soft and smooth
Keeps formulas from drying out

Glycerin is a simple, colorless liquid. Most cosmetic glycerin is made from plant oils, such as soybean, palm, or coconut oil. Some is made from animal fats, and some is produced synthetically from petroleum-based starting materials. Its molecule has several spots that attract water, which is why it holds moisture so well.

Formulators use glycerin as a humectant. That means it pulls water toward the outer layer of skin and helps it stay hydrated. You will often find it in moisturizers, cleansers, body washes, shampoos, and sunscreens. It feels smooth and slightly slippery rather than greasy, and it mixes easily with water. It also helps keep formulas from drying out.

Good for

Suits most skin types, including dry and sensitive skin, and is widely used in everyday moisturizers and cleansers.

Frequently asked questions

Is glycerin good for dry skin?

Yes. Glycerin is a humectant, so it helps draw moisture into the outer layer of skin. It works best when a moisturizer also includes an ingredient that seals that water in, such as an emollient or oil. Applying it to slightly damp skin can help.

Does glycerin cause breakouts?

Glycerin is widely considered gentle and is generally well tolerated, including by people with oily or acne-prone skin. Any ingredient can irritate a particular person, though, so patch testing a new product is a sensible habit. If you notice redness or stinging, stop using the product.