Research

Hormonal

Long-term consumption of diets high in fat and/or fructose attenuates insulin and leptin production, leading to increased energy intake and contributing to weight gain and obesity.

If you eat a lot of fat and sugar, your body may produce less of the hormones (insulin and leptin) that tell your brain you are full and have enough energy. This can make you hungrier and lead to weight gain over time. It is not just about 'spiking' insulin with carbs, but how your long-term diet affects these hormonal signals.

GoodSupportsHIGH confidence
Dietary fat and fructose do not stimulate Insulin secretion and leptln production. Therefore, attenuated production of Insulin and leptln could lead to In-creased energy Intake and contribute to weight gain and obe-sity during long-term consumption of diets high In fat and/or fructose.
Peter J. Havel · Experimental Biology and Medicine · 2001

Why this rating

The paper is a comprehensive review citing multiple animal and human studies, though it does not present new primary data itself.

Source

Peripheral Signals Conveying Metabolic Information to the Brain: Short-Term and Long-Term Regulation of Food Intake and Energy Homeostasis

Peter J. Havel · Experimental Biology and Medicine · 2001

DOI 10.1177/153537020122601102

narrative_reviewCited 481×
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DOI resolved against Crossref · corpus check 2026-06-10

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