In mice fed a high-fat diet, those that experienced repeated cycles of weight loss and regain consumed less food overall than mice that maintained a stable weight, and as a result, they had lower body weight and less body fat.
See the scientific wording
In male C57BL/6J mice fed a fixed high-fat diet, weight cycling is associated with reduced overall energy intake during the study period, which is linked to lower body weight and fat mass compared to non-cycling controls.
Correlational — new studies may shift this
Randomized trialsOne low-scoring study links this claim to the outcome, but causation is not established.
What the research says
1 study reviewedSupporting (1)
Cohort StudyAnimal2017
Mice that kept gaining and losing weight ate less food overall than mice that stayed the same weight, so they ended up thinner—even though their bodies didn’t slow down their metabolism. The study shows eating less, not a slower metabolism, is why they lost weight.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
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When male C57BL/6J mice on a high-fat diet go through repeated cycles of eating less and then eating normally again, they end up eating less food overall than mice that eat the same amount all the time. This lower total food intake means their bodies burn more fat than they store, so they stay thinner and have less fat tissue — even though their metabolism doesn’t slow down. This happens because after each period of eating less, they don’t fully make up for the lost calories during the eating periods, so the fat loss adds up over time (10.3390/nu9101149).
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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In mice fed a high-fat diet, those that experienced repeated cycles of weight loss and regain consumed less food overall than mice that maintained a stable weight, and as a result, they had lower body weight and less body fat.
Mechanism
1 studyWhen male C57BL/6J mice on a high-fat diet keep losing and regaining weight, they eat less food overall than mice that stay the same weight — even though they eat normally after each diet break. This means they burn more fat than they store over time, so they end up thinner with less fat tissue, and their metabolism doesn’t slow down to compensate (10.3390/nu9101149).
When male C57BL/6J mice on a high-fat diet go through repeated cycles of eating less and then eating normally again, they end up eating less food overall than mice that eat the same amount all the time. This lower total food intake means their bodies burn more fat than they store, so they stay thinner and have less fat tissue — even though their metabolism doesn’t slow down. This happens because after each period of eating less, they don’t fully make up for the lost calories during the eating periods, so the fat loss adds up over time (10.3390/nu9101149).
Repeated cycles of calorie restriction followed by ad libitum re-feeding reduce daily energy intake below maintenance levels during restriction phases, leading to cumulative suppression of total food consumption over the study period (10.3390/nu9101149)
Reduced cumulative energy intake creates a sustained negative energy balance, triggering mobilization of stored lipids from white adipose tissue without compensatory reductions in energy expenditure (10.3390/nu9101149)
During re-feeding periods, energy intake returns to baseline levels but fails to fully compensate for deficits incurred during restriction, preventing restoration of adipose tissue mass and resulting in smaller adipocytes (10.3390/nu9101149)
Chronic reduction in lipid storage leads to decreased epididymal and perirenal white adipose tissue mass and reduced adipocyte size, with no significant change in lean mass or food efficiency (10.3390/nu9101149)
Lower adipose tissue mass results in reduced leptin secretion, reflecting diminished fat stores without evidence of metabolic adaptation (10.3390/nu9101149)
Evidence from Studies
Supporting (1)
Community contributions welcome
Mice that kept gaining and losing weight ate less food overall than mice that stayed the same weight, so they ended up thinner—even though their bodies didn’t slow down their metabolism. The study shows eating less, not a slower metabolism, is why they lost weight.
Contradicting (0)
Community contributions welcome
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
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 of Weight Cycling Effects on Energy Intake and Body Composition in Rodent Models on High-Fat Diets
Systematic review and meta-analysis of all published controlled studies in male C57BL/6J mice on fixed high-fat diets comparing weight-cycling groups to non-cycling controls, measuring total energy intake, body weight, and fat mass over defined periods.
Randomized Controlled Trial of Weight Cycling vs. Stable Weight on Energy Intake and Adiposity in Male C57BL/6J Mice on High-Fat Diet
Randomly assign male C57BL/6J mice on a fixed high-fat diet to either a weight-cycling protocol (repeated cycles of weight loss and regain) or a stable-weight control group; measure daily energy intake, body weight, and fat mass over 12–16 weeks.
Prospective Cohort Study of Energy Intake Trajectories and Body Composition Changes in Male C57BL/6J Mice Undergoing Weight Cycling vs. Stable Weight on High-Fat Diet
Follow a cohort of male C57BL/6J mice on a fixed high-fat diet, categorizing them by weight trajectory (cycling vs. stable) and prospectively measuring energy intake, body weight, and fat mass at regular intervals over 16 weeks.
Animal Model Study Comparing Energy Intake and Fat Mass in Weight-Cycling vs. Non-Cycling Male C57BL/6J Mice on High-Fat Diet
Compare energy intake, body weight, and fat mass in two groups of male C57BL/6J mice on a fixed high-fat diet: one group subjected to weight cycling (induced by intermittent fasting or caloric restriction followed by refeeding), and one group maintained at stable weight, over an 8–12 week period.
Case Report of Energy Intake and Body Composition Changes in a Single Male C57BL/6J Mouse Undergoing Weight Cycling on High-Fat Diet
Detailed longitudinal monitoring of energy intake, body weight, and fat mass in a single male C57BL/6J mouse subjected to weight cycling on a fixed high-fat diet over 10 weeks.