Why surgery burns more fat than dieting, even when you lose the same weight
Gastric Bypass Promotes More Lipid Mobilization Than a Similar Weight Loss Induced by Low-Calorie Diet
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Two ways to lose weight: eating less or having surgery. Both make you lose the same total weight, but surgery makes your body burn more fat from your belly and under your skin.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 538 / 72
Evidence Score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Two ways to lose weight: eating less or having surgery. Both make you lose the same total weight, but surgery makes your body burn more fat from your belly and under your skin.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 538 / 72
Evidence Score
Groups of people are followed over time to see who develops an outcome. Strong for identifying risk factors and associations, but cannot prove causation as firmly as RCTs.
Publication
Authors
Kullberg J, Sundbom M, Haenni A, Freden S, Johansson L, Börnert P, Ahlström A, Ahlström H, Karlsson A
Related Content
Claims (4)
After one month, morbidly obese women who had gastric bypass surgery lost a higher percentage of body fat than those who followed a low-calorie diet, even though both groups lost the same amount of total weight. This suggests that the surgery affects fat metabolism in a way that diet alone does not.
After gastric bypass surgery, liver fat levels did not decrease significantly even though patients lost a lot of body fat, but when people lost the same amount of weight by eating fewer calories, their liver fat dropped substantially. This suggests that the method of weight loss affects liver fat differently.
After gastric bypass surgery, levels of free fatty acids in the blood rose and stayed higher than after dieting alone, even when people consumed the same number of calories, suggesting that the surgery increases fat breakdown in the body.
After gastric bypass surgery, levels of a hormone called B-type natriuretic peptide increased significantly, but did not change when people followed a low-calorie diet. This suggests the surgery may trigger a hormonal change that affects fat breakdown.