Cutting calories doesn’t help improve heart health markers in obese people—what matters more is what they eat (carbs and fat), not how many calories they consume.

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Pro

53

Against

Evidence from Studies

Supporting (0)

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Community contributions welcome

No supporting evidence found

Contradicting (1)

53

Community contributions welcome

53

Effects of macronutrient intake in obesity: a meta-analysis of low-carbohydrate and low-fat diets on markers of the metabolic syndrome

Systematic Review With Meta-Analysis

Human

2021 Mar 9

The study found that eating fewer carbs or less fat helped improve health markers in obese people, even when calories didn’t change much — but that doesn’t mean changing how many calories you eat doesn’t matter at all. The claim says it doesn’t matter, but the study shows it can still play a role, so the claim is wrong.

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.

Source Study

Effects of macronutrient intake in obesity: a meta-analysis of low-carbohydrate and low-fat diets on markers of the metabolic syndrome

Score: 53

DOI: 10.1093/nutrit/nuaa044

Similar Assertions

When obese people eat more fat (as a percentage of their calories), their blood pressure and blood triglycerides go down—even if they don’t lose weight—making their heart health better.

53

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80%

When obese people eat fewer carbs (as a percentage of their calories), their blood pressure and triglycerides drop—even if they don’t lose weight—improving their heart health.

53

0

74%

For women who are obese but otherwise healthy, eating very few carbs or eating fewer calories with less fat both help lower blood pressure, cholesterol, and blood sugar about the same amount — neither diet wins by a noticeable margin.

55

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71%

To lower blood sugar significantly in obese people without diabetes, they need to lose a lot of weight—about 15 kg—no matter if they eat low-carb or low-fat.

53

0

71%

For women who are obese but otherwise healthy, eating very few carbs or eating fewer calories with less fat both help lower blood pressure, cholesterol, and blood sugar about the same amount — neither diet wins by a noticeable margin.

55

0

71%