Glycerin — answers to glycerin, glycerol
Appears in 5 scanned products.
A small, simple molecule with three water-loving arms, produced by splitting fats and oils (plant or animal) or made synthetically. It has been a staple of skincare and soap for over a century.
Why it’s used
A humectant — it pulls water from the air and from deeper skin layers to the surface, helping products feel less drying and skin feel softer. It also helps stabilize emulsions and can improve the texture of soaps and lotions.
What the evidence says
One of the most studied humectants in cosmetics. CIR has reviewed it as safe for use in cosmetic products. Occasional reports of mild irritation or a sticky feel exist at high concentrations, but no established safety concern at typical use levels.
Context
Works in both rinse-off and leave-on products. At very high concentrations in low-humidity conditions it can theoretically pull water out of skin rather than in, but this is not how it behaves at the levels used in commercial formulas.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.