Propylene Glycol
Humectant
Propylene glycol is a clear, slightly thick liquid used in many products to keep them moist or help other ingredients mix. You can find it in things like medicines, cosmetics, and some foods to make them smooth or last longer.
Source: FDA GRAS list
While generally considered safe by regulatory bodies like the FDA for food and cosmetic use, some individuals with sensitive skin may experience irritation or allergic reactions.
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Last updated: May 16, 2026