What is Glycerin?
Glycerin is a humectant that draws water into the skin. A universal humectant rated 0/5. Non-comedogenic and fungal-acne safe, suitable for all skin types.
You may see it on labels as Glycerin, Glycerine, Glycerol, so it can hide under more than one name in an ingredient list.
Where Glycerin shows up
You'll most often find Glycerin in serums, toners, and moisturisers of every kind. Separately from clogging, its irritancy is rated 0/5 — low, so it's unlikely to sting or sensitise on its own.
Is Glycerin bad for acne-prone skin?
Because it barely registers on the comedogenic scale, Glycerin is generally a safe pick for breakout-prone skin and is often recommended as a gentler alternative to heavier ingredients.