Obesity is better explained as a hormonal disorder than a caloric imbalance

The standard model — eat too much, move too little, get fat — has a causality problem. It treats fat tissue as a passive dump for surplus calories. The hormonal model inverts this: people overeat and are sedentary because they are getting fatter, not the other way around.

Fat tissue is a reserve energy supply, not a storage tank. It takes instruction from insulin, the hormone that regulates blood sugar. Refined carbohydrates digest quickly, spike blood glucose, and trigger the pancreas to flood the bloodstream with insulin. When insulin is elevated, fat tissue is signaled to pull energy from the blood and stop releasing it. The person is storing energy even while feeling tired and hungry. They eat more not from weakness but from biochemistry.

This was not news to the prewar European researchers, who were practicing physicians expert in metabolic systems. The postwar American researchers who dominated the field were mostly epidemiologists — trained to find population-level correlations, not fluent in hormones or endocrinology. That gap produced foundational errors: conflating dietary cholesterol with blood cholesterol, treating fat tissue as a passive sink, ignoring homeostasis. The liver manufactures most blood cholesterol regardless of what you eat. Eating 25 eggs a day does not significantly raise cholesterol levels for most people.

Source claim: Obesity is driven by refined carbohydrate overconsumption triggering sustained insulin elevation, which instructs fat tissue to store and not release energy — making overeating and fatigue consequences of fat gain, not causes.