What's the thyroid?
Yes, it can make you bloat up and shrink down faster than a breakup. But your thyroid can also do so much more. It produces thyroid hormones, which control your body's use of vitamins, proteins, carbohydrates, fats, electrolytes and water, according to the American Thyroid Association. These hormones also regulate the body's immune response and how your body reacts to other hormones and drugs.
The thyroid gland is controlled by thyroid-stimulating hormone (TSH) and thyrotropin-releasing hormone (TRH).