In mice on a high-fat diet, repeatedly losing and regaining weight through calorie restriction does not worsen key metabolic markers such as blood sugar, fat levels in the blood, or body fat compared...
Mechanism
Synthesis from 1 study
When mice eat the same high-fat food but cycle between eating less and eating normally, they end up eating less overall. This means their bodies burn more fat than they store, keeping fat cells small and blood sugar and fat levels normal — just like in mice that never dieted. This happens because...
Most probable mechanism
When mice eat the same high-fat food but go through cycles of eating less and then eating normally again, they end up eating less food overall. This means they burn more fat than they store, so their fat cells stay smaller and their body fat doesn’t increase. Because their fat tissue stays smaller, their blood sugar, fat levels in the blood, and a hormone called adiponectin stay normal, just like in mice that never dieted. This happens without any change in how efficiently they use food or how much energy they burn, so the key is simply eating less over time — not the weight changes themselves. This is shown in the study with DOI 10.3390/nu9101149.
Repeated cycles of calorie restriction followed by ad libitum re-feeding on a consistent high-fat diet result in lower cumulative food intake over time compared to non-cycling controls, as measured by total food consumption across the experimental period.
Reduced cumulative energy intake creates a sustained negative energy balance during restriction phases, leading to mobilization of stored lipids from white adipose tissue without altering energy expenditure or food efficiency.
During re-feeding periods, food intake returns to baseline levels but does not fully compensate for prior deficits, preventing restoration of adipose tissue mass and resulting in persistently smaller adipocytes.
Smaller adipocytes and reduced white adipose tissue mass lead to lower leptin secretion and maintain normal secretion of adiponectin, preserving insulin sensitivity and lipid metabolism without elevating serum glucose, triglycerides, or free fatty acids.
Evidence from Studies
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