9 Disgusting Things You Didn’t Know You’ve Been Eating Your Whole Life

4 Anti-Freeze

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Listed under “ingredients” as: Propylene Glycol

How we consume it: Salad dressing

Propylene glycol is commonly used as an anti-freeze (but less toxic than ethylene glycol, a similar product), and can also be found in salad dressings as a thickening agent.