A low-carb diet without cutting calories causes more weight loss over 6 months than a high-carb diet with calorie limits.
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In the population studied, a low-carbohydrate diet without calorie restriction causes greater weight loss over 6 months than a high-carbohydrate calorie-restricted diet; no absolute or relative effect size was reported.
Not tested yet
No study measured the main part of this claim. No part of this claim has been tested yet.
Not tested yet
No study measured the main part of this claim. No part of this claim has been tested yet.
Parts of this claim
A low-carbohydrate diet without calorie restriction causes greater weight loss than a high-carbohydrate calorie-restricted diet over 6 months.
Not testedNo studies
Evidence is judged against each part on its own, so a study that tests one part never counts as a verdict on the whole claim.
Score breakdown, mechanism chain, raw evidence, ideal studies needed
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A low-carb diet without cutting calories causes more weight loss over 6 months than a high-carb diet with calorie limits.
Evidence from Studies
Last searched 7d ago
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review and Meta-Analysis of Randomized Trials Comparing Low-Carbohydrate Ad Libitum vs High-Carbohydrate Calorie-Restricted Diets for 6-Month Weight Loss
Meta-analysis of parallel-group RCTs in adults with overweight or obesity; intervention: low-carbohydrate diet without calorie restriction; comparator: high-carbohydrate calorie-restricted diet; primary outcome: change in body weight at 6 months; assess heterogeneity, risk of bias, and publication bias.
Randomized Controlled Trial of Low-Carbohydrate Ad Libitum vs High-Carbohydrate Calorie-Restricted Diet for 6-Month Weight Loss
Parallel-group RCT in adults with overweight or obesity; intervention: low-carbohydrate diet without calorie restriction; comparator: high-carbohydrate calorie-restricted diet; primary outcome: weight change at 6 months; secondary: adherence, body composition, adverse events; blinded outcome assessors and intention-to-treat analysis.
Prospective Cohort Study of Low-Carbohydrate Without Calorie Restriction vs High-Carbohydrate Calorie-Restricted Diets and 6-Month Weight Change
Prospective cohort of adults; exposure: low-carbohydrate diet without calorie restriction vs high-carbohydrate calorie-restricted diet; outcome: measured weight change at 6 months; adjust for baseline BMI, demographics, physical activity, and total energy intake.
Case-Control Study of Prior Low-Carbohydrate Ad Libitum vs High-Carbohydrate Calorie-Restricted Diet and Weight Loss Success
Cases: adults who lost ≥5% body weight over 6 months; controls: adults who did not; compare recalled diet pattern (low-carbohydrate without calorie restriction vs high-carbohydrate calorie-restricted) using validated food frequency questionnaires.
Cross-Sectional Survey of Diet Pattern and Weight Status Among Adults Using Low-Carbohydrate Ad Libitum vs High-Carbohydrate Calorie-Restricted Diets
Cross-sectional survey of adults; exposure: self-reported current diet pattern; outcome: measured BMI or body weight; adjust for age, sex, and socioeconomic status.