If you swap out 10% of the carbs in your diet for more protein, it might lower certain proteins in your 'good cholesterol' that are linked to heart disease — and this change happens in people with slightly high blood pressure after just 4 weeks.

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Evidence from Studies

Supporting (1)

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Community contributions welcome

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Partially Replacing Dietary Carbohydrate With Unsaturated Fat or Protein Shifts Protein-Based HDL Subspecies Toward Lower Coronary Heart Disease Risk

Randomized Controlled Trial

Human

2026 Jan

This study found that when people with high blood pressure swapped a small amount of carbs for protein, their blood got fewer harmful protein particles linked to heart disease—exactly what the claim says.

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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

Partially Replacing Dietary Carbohydrate With Unsaturated Fat or Protein Shifts Protein-Based HDL Subspecies Toward Lower Coronary Heart Disease Risk

Score: 76

DOI: 10.1161/ATVBAHA.125.323709

Similar Assertions

If you swap out carbs in your diet for healthy fats or protein, your body may make more of a good cholesterol protein that helps protect your heart, but less of another protein linked to heart disease risk — and this happens within just four weeks if you have slightly high blood pressure.

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If you swap out 10% of the carbs in your diet (like bread or sugar) for healthier fats (like olive oil or nuts), your body might produce a little more of a good protein in your blood that helps protect your heart — and this change can happen in just four weeks if you have slightly high blood pressure.

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