Jason Fung

“Obesity is hormonal, not only caloric.”

Fung's central claim shifts focus from blame to insulin and regulation.

“Refined carbohydrates change the signal.”

Food quality affects hunger, glucose, and storage differently.

“Meal timing matters.”

Constant eating can keep the body in a fed state for most of the day.

“Fasting is a tool, not a punishment.”

The book frames fasting windows as a way to lower insulin exposure.

“Insulin resistance builds gradually.”

Repeated high signals can make normal regulation harder.

“Stress and sleep belong in the model.”

Cortisol and poor rest can undermine food-only plans.

“Sustainable change beats moral intensity.”

The practical lesson is signal design, not self-hatred.