Can Thyroid Problems Cause Weight Gain Without Eating More?
Yes, thyroid problems can cause significant weight gain without any increase in food intake. Hypothyroidism, affecting about 5% of Americans, slows your metabolism by up to 40%, causing your body to burn fewer calories at rest. This metabolic slowdown means you gain weight even while eating the same amount of food. The thyroid hormone T4 directly regulates how efficiently your cells use energy, and when levels drop, your body stores more calories as fat rather than burning them. Additionally, hypothyroidism causes water retention and constipation, contributing to rapid weight increases of 10-20 pounds within months.
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