When clients are gaining weight despite eating relatively well, or struggling to lose weight despite genuine effort, one of the first things I explore is stress. Not because stress is an excuse, but because its physiological effects on body weight and composition are real, measurable, and frequently underestimated.
Cortisol and Fat Storage
When you experience stress, your adrenal glands release cortisol — a hormone that prepares the body for a physical threat. Among its many effects, cortisol signals the body to store fat, particularly visceral fat in the abdominal area. For modern humans experiencing chronic psychological stress, the cortisol release happens without the corresponding physical activity that would burn the released energy. The result is fat storage without caloric excess.
Cortisol and Appetite
Cortisol also directly increases appetite and specifically drives cravings for high-calorie, high-fat, high-sugar foods. Your body is trying to ensure adequate fuel for what it perceives as a sustained physical threat. Clients who notice that they eat much more during stressful periods are experiencing this mechanism directly. The craving for comfort food under stress isn't weakness. It's cortisol.
Stress doesn't just affect how you eat. It changes the hormonal environment that determines what your body does with what you eat.
What This Means in Practice
For clients whose weight is resistant to change despite genuine dietary effort, I always ask about stress levels, life circumstances, and sleep quality. If chronic stress is a significant factor, we address it as part of the nutrition plan — not separately from it. Movement is one of the most effective cortisol-lowering interventions available. Sometimes the most useful nutrition intervention is not a dietary change at all — it's addressing the thing that's making dietary changes nearly impossible.
If stress is part of your health picture, let's look at it together.
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