The Claim

Periodic caloric surges transiently elevate leptin and thyroid hormone levels, thereby mitigating metabolic adaptation during prolonged energy restriction.

Source: This Doctor’s Diet to Get Under 10% Bodyfat is So Simple, it’s Almost Crazy

What the research says

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Supports
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Challenges
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These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works
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In plain English

Periodic increases in calorie intake raise leptin and thyroid hormone levels, which reduces the slowing of metabolism that occurs during long-term dieting.

See the scientific wording

Periodic caloric surges can transiently elevate leptin and thyroid hormone levels, mitigating metabolic adaptation during prolonged energy restriction.

Why this might work

When calories are low for a long time, the body blocks thyroid hormones from entering tissues and stops responding to the fullness signal from fat cells. Eating more calories briefly reverses this blockage, letting thyroid hormones enter tissues again and restoring the fat cell signal's ability to reduce hunger and boost energy use.

Supported mechanismbased on 2 studies

Score breakdown, mechanism chain, raw evidence, ideal studies needed

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.