Lose weight by controlling these hormones | Bariatric surgeon Dr. Andrew Jenkinson

What It Covers

Bariatric surgeon Dr. Andrew Jenkinson explains how hormones like leptin and insulin control weight through a brain-regulated set point, why calorie counting fails long-term, and how processed foods cause metabolic dysfunction leading to obesity.

Key Questions Answered

• •Weight Set Point Mechanism: The hypothalamus maintains a predetermined weight through leptin signals from fat cells and metabolic adjustments. When dieting drops weight below this set point, the brain triggers hunger and reduces basal metabolism by up to 50%, making sustained weight loss nearly impossible without addressing root causes.
• •Leptin Resistance from Insulin: High insulin levels from sugar, refined carbohydrates, and constant snacking block leptin receptors in the brain. This prevents the hypothalamus from detecting stored fat, causing inappropriate hunger signals and low metabolism despite carrying excess weight—making hunger a symptom of obesity, not the cause.
• •Diet Cycling Increases Weight: Repeated calorie restriction triggers the body to interpret dieting as famine, prompting the brain to increase the weight set point as insurance against future food scarcity. Studies show mice on intermittent restriction diets ended up heavier than those continuously eating Western diets despite consuming identical total calories.
• •Four-Phase Food Strategy: Eliminate sugar for 30 days first, then stop snacking between meals, next remove processed foods, and finally reduce carbohydrates to under 100 grams daily. This sequence progressively lowers insulin levels, restores leptin sensitivity, and naturally resets the weight set point without calorie counting or willpower battles.