If you heat soybean oil over and over and feed it to male rats, their blood vessels may tighten up more than they should, which could raise their blood pressure.

14

Pro

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Against

Evidence from Studies

Supporting (1)

14

Community contributions welcome

14

The role of repeatedly heated soybean oil in the development of hypertension in rats: association with vascular inflammation

Cohort Study

Animal

2012 Oct

The study gave rats oil that was reheated five or ten times and found that it made their blood vessels tighten more than usual, which can raise blood pressure—exactly what the claim says.

Contradicting (0)

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No contradicting evidence found

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According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

The role of repeatedly heated soybean oil in the development of hypertension in rats: association with vascular inflammation

Score: 14

DOI: 10.1111/j.1365-2613.2012.00839.x

Similar Assertions

If you keep heating soybean oil over and over and feed it to male rats for a long time, their blood pressure goes up by a third — but if you feed them fresh oil, their blood pressure stays normal. This suggests that overheated cooking oil might be bad for blood pressure in animals.

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77%

If you feed male rats the same cooking oil over and over again after heating it multiple times, their main artery walls get thicker and stiffer, which might lead to high blood pressure.

14

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73%