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Biology

Thyroid Hormone Synthesis and Regulation of Metabolism

Quick fact

Thyroid hormones increase your basal metabolic rate by up to 40% in hyperthyroidism, causing rapid weight loss and heat intolerance, while too little can decrease metabolism by nearly the same amount.

Why this is interesting

Ever wonder why your energy level spikes after a meal or why some people feel cold when others are warm? All of that is orchestrated by a small gland in your neck — the thyroid — and its hormones that set your body's metabolic thermostat.