Glycerin
What it does
Glycerin is a humectant — it pulls water into the outer layers of the skin and helps hold it there. It is one of the oldest, most common, and most dependable moisturizing ingredients in all of skincare, which is why you will find it near the top of so many ingredient lists.
What to know
Glycerin is gentle, non-comedogenic (it does not clog pores), and well tolerated across every skin type, including sensitive and acne-prone. It is very rarely a source of irritation, and it works well alongside almost any other ingredient.
Commonly found in
Moisturizers, cleansers, serums, toners, and body care — essentially everywhere.
Frequently asked questions
What does glycerin do for skin?
It is a humectant that draws water into the outer skin and helps keep it hydrated and soft. It is one of the most reliable moisturizing ingredients there is.
Is glycerin good for sensitive or acne-prone skin?
Yes. It is gentle, well tolerated, and non-comedogenic, so it suits sensitive and breakout-prone skin as well as dry skin.
Is glycerin safe?
Glycerin has a long track record of safe use in cosmetics and is very rarely a cause of irritation.
Evidence
Last updated: August 5, 2026