
What Actually Happens When You Crash Diet
Severe restriction lowers your metabolic rate by more than the weight loss predicts, and the tissue you lose first is not only fat.
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Understanding insulin resistance, blood sugar, and metabolic rate. What standard lab work catches, what it misses, and how to read your own numbers over time.
The best evidence says daily energy expenditure is stable from your twenties to your sixties. What changes in midlife is body composition, not metabolic rate, and that distinction matters.
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Clear answers for complex health questions, written with care.

Severe restriction lowers your metabolic rate by more than the weight loss predicts, and the tissue you lose first is not only fat.
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Eat less and move more fails predictably in insulin resistance, and the scale is the last thing to respond. What to measure instead, and why insulin is the starting point.
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What metabolic rate really is, why crash dieting slows it, and the small number of changes that reliably raise daily energy expenditure.
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Insulin resistance develops silently for years before glucose rises. Learn the early signs, the tests that catch it, and what actually reverses it.
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Standard blood work is built to detect disease, not early metabolic dysfunction. An endocrinologist explains what normal labs miss and which numbers actually matter.
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