In mice fed a high-fat diet, repeated cycles of losing and regaining weight were linked to less fat around internal organs and lower levels of the hormone leptin, compared to mice that did not cycle...

Pro

Against

Mechanism

Synthesis from 1 study

How it works

When mice lose and regain weight multiple times on the same high-fat diet, they end up eating less overall than mice that never diet, so their fat stores never fully come back — leading to less belly and kidney fat and lower levels of the fat-signaling hormone leptin (10.3390/nu9101149).

Most probable mechanism

In Simple Terms

When mice repeatedly lose and regain weight on the same high-fat diet, they eat less overall than mice that never diet, so their fat stores don’t fully refill after each cycle, leading to smaller fat cells and less fat in the abdomen and around the kidneys, which also lowers the hormone leptin that signals fat levels to the brain (10.3390/nu9101149).

Causal chain

Repeated cycles of calorie restriction followed by ad libitum re-feeding result in a persistent reduction in cumulative daily energy intake below that of non-cycling controls (10.3390/nu9101149).

Verified by multiple studies

which leads to

Reduced cumulative energy intake creates a chronic negative energy balance during restriction phases, mobilizing stored lipids from adipose tissue without increasing energy expenditure (10.3390/nu9101149).

Verified by multiple studies

which leads to

During re-feeding periods, energy intake returns to baseline levels but is insufficient to fully restore adipose tissue mass due to the cumulative deficit, leading to smaller adipocytes and reduced epididymal and perirenal fat mass (10.3390/nu9101149).

Verified by multiple studies

which leads to

Smaller adipocytes secrete less leptin, resulting in significantly reduced serum leptin levels that reflect the lower adipose tissue mass (10.3390/nu9101149).

Verified by multiple studies

Evidence from Studies

Supporting (1)

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Body Weight Cycling with Identical Diet Composition Does Not Affect Energy Balance and Has No Adverse Effect on Metabolic Health Parameters

Cohort Study

Animal

2017 Oct 20

Contradicting (0)

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No contradicting evidence found

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

Body Weight Cycling with Identical Diet Composition Does Not Affect Energy Balance and Has No Adverse Effect on Metabolic Health Parameters

Score: 16

DOI: 10.3390/nu9101149

Similar Assertions

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.

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When overweight mice eat significantly less food, they lose body fat no matter if their diet is low in carbs, low in fat, or high in protein — the key is eating fewer calories overall.

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