Small experiments on ruminant trans fats and heart health markers haven't given clear answers — maybe because they used too few people or too much fat that you can't actually eat in real life.

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Evidence from Studies

Supporting (1)

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Community contributions welcome

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Effects of ruminant trans fatty acids on cardiovascular disease and cancer: a comprehensive review of epidemiological, clinical, and mechanistic studies.

Narrative Review

Human

2011 Jul

This study looked at natural fats from cows and found that past studies on their heart effects were too small or used way too much of the fat, so we can’t be sure if they’re good or bad — just like 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

Effects of ruminant trans fatty acids on cardiovascular disease and cancer: a comprehensive review of epidemiological, clinical, and mechanistic studies.

Score: 1

DOI: 10.3945/an.111.000521

Similar Assertions

Some studies suggest that the natural trans fats found in milk and meat might not raise heart disease risk the same way that artificial trans fats in fried and baked foods do.

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82%

Trans fats from dairy and meat don’t seem to harm cholesterol or cause inflammation like the ones made in factories — some might even be a little good for you.

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82%

Eating man-made trans fats found in fried and processed foods is linked to a higher chance of dying from heart disease or having a heart attack, but the natural trans fats in dairy and meat don’t seem to have the same effect.

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78%

Trans fats from cows and other animals (like butter) don’t seem to raise heart disease risk, but trans fats made in factories (like in margarine) do—so where the fat comes from matters.

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78%

We don’t know if natural trans fats from meat and dairy affect cancer risk — no solid human studies have looked at this yet.

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76%