You see it before the final whistle blows. A boy—ten, or maybe nine—walks off the mat like he’s carrying bricks on his back. His face is red, his eyes damp. Waiting for him is his father, arms folded like a verdict. “You lost to that kid? You were up by two.” The boy opens his mouth, but nothing he says will be enough. The response is swift: a shake of …

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We often speak of weight as a matter of simple math—calories in, calories out. But the body doesn’t work like an equation when it’s grieving or under chronic stress. It behaves more like a survivor, clinging tightly to resources in the face of perceived danger. And in that physiological equation, cortisol—our primary stress hormone—plays a central role.

The cortisol connection

Cortisol is released by the adrenal glands in response to stress through …

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A woman sat nervously in front of me, eyes wide, voice low. “I saw this video on TikTok,” she said. “Now I’m not sure I want to try it.” “It” was semaglutide—one of the most transformative medications we’ve seen for weight loss and metabolic health in years. But her fear wasn’t uncommon. Like many patients I see, she came in hopeful, but hesitant—torn between her desire to get healthy and …

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