Last reviewed May 2026 · 1 min read
Is Polyethylene Glycol (PEG) vegan?
Also known as: Macrogol
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Source can be plant or animal.
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It depends — The PEG itself is a synthetic petroleum derivative (vegan).
01 · The basics
What is Polyethylene Glycol (PEG)?
A broad class of synthetic polymers used as thickeners, solvents, and moisture-carriers in cosmetics and medicine.
02 · The source
Where it comes from
The PEG itself is a synthetic petroleum derivative (vegan). However, PEGs are often attached to fatty acids (like PEG-100 Stearate) which can be animal-derived. Verification is needed.
03 · Alternatives
Best vegan alternatives
Plant-derived PEGs
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Frequently asked
FAQ
Are PEGs vegan?
Pure PEG is synthetic (vegan). But if it is combined with a fatty acid (e.g., PEG-40 Hydrogenated Castor Oil vs. PEG-8 Stearate), you must check the source of the fatty acid.
Why do clean beauty brands avoid PEGs?
The manufacturing process of PEGs can sometimes leave behind trace amounts of 1,4-dioxane, a potential carcinogen, leading some consumers to seek alternatives.
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