Ingredient
Glycerin
No known concerns Strong evidence Humectant
Humectant
Polyol humectant. One of the most extensively studied cosmetic ingredients; CIR safe-as-used at all typical concentrations.
On the plus side
Humectant. Improves skin hydration and barrier function across all skin types; one of the best-tolerated cosmetic ingredients.
Sources
GlowOS describes what regulatory bodies and published research say about an ingredient — it does not tell you what to use or avoid, and none of this is medical advice. Concentration, formulation, and your own skin all matter. For skin conditions, see a dermatologist.
GlowOS scores every product on your shelf from its full ingredient list — learn more.