Ingredient

TBHQ Ascorbic Acid To Preserve Freshness

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Source
Not animal-derived
Allergen
No
Role in food
TBHQ is added to foods to prevent fats and oils from spoiling, which helps …

What it is

TBHQ, or tertiary butylhydroquinone, is a synthetic antioxidant. It is made from hydroquinone, which is derived from petroleum.

Why it's used

TBHQ is added to foods to prevent fats and oils from spoiling, which helps keep products fresh. It is often found in processed foods that contain fats, such as microwave popcorn, fried snacks, and baked goods.

Health notes

In the US, TBHQ is permitted as a food additive. The FDA has evaluated its safety and allows its use in certain foods. International bodies like JECFA and EFSA have also evaluated TBHQ. Some studies have raised questions about its effects at very high doses, but regulatory bodies consider it safe at the levels typically found in food.

Allergen info

Not a major allergen.

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Last updated: September 28, 2026

Note: This site presents label data from USDA FoodData Central for general information. It is not medical advice. Check the package label; formulations change.