If you swap out foods like butter and cheese for things like white bread and sugary snacks, it might raise your blood sugar and fat levels after meals, which could make your heart more likely to get sick.
Evidence from Studies
Supporting (4)
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This study found that eating lots of refined carbs like white bread and sugary foods increases the risk of heart disease, which supports the idea that swapping butter or meat fat for these carbs is bad for your heart.
This study found that swapping butter or fatty meats for white bread and sugary foods made blood sugar spike higher after meals, which is exactly what the claim says happens — and those spikes are linked to heart disease risk.
The Evidence for Saturated Fat and for Sugar Related to Coronary Heart Disease.
When people swap foods like butter and cheese (saturated fat) for sugary snacks and sodas (refined carbs), their blood sugar and fat levels spike more after meals, which hurts their heart over time—this study says that’s a bad idea and supports the claim.
Fat, Sugar, Whole Grains and Heart Disease: 50 Years of Confusion
This study says swapping butter or meat fat for white bread, sugar, and soda doesn’t help your heart—and might actually hurt it by raising blood sugar and fat levels after meals.
Contradicting (1)
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The study found that swapping butter or meat fat for sugary carbs made some blood fats worse, but not as badly as the claim says — and it actually found that swapping fat for healthy fats like olive oil was even better. So it doesn’t fully agree with the claim.
Gold Standard Evidence Needed
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.