Plant sterols — natural compounds in flaxseed — help keep the oil from going bad by stopping the chain reaction that causes rancidity and calming down unstable molecules in the oil.

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Evidence from Studies

Supporting (1)

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Oxidative stability of flaxseed oil: effects of tocopherols, phytosterols and extraction conditions.

Cross-Sectional Study

In Vitro

2026 Feb 15

The study found that adding phytosterols to flaxseed oil helps stop it from going bad by calming down the harmful chemical reactions that cause spoilage, just like the claim says.

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No contradicting evidence found

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Source Study

Oxidative stability of flaxseed oil: effects of tocopherols, phytosterols and extraction conditions.

Score: 3

DOI: 10.1016/j.foodchem.2025.147708

Similar Assertions

When you add both vitamin E and plant sterols to flaxseed oil together, they work better than either one alone to keep the oil from going rancid — this combo could help make healthier oils that last longer.

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