When it comes to weight gain or loss, the thyroid plays
a key role in the function of the metabolism, aiding the
physical and chemical processes in the body that convert
or use energy. The thyroid also controls how fast your body burns calories.
There are two types of thyroid disorders that can affect a person's weight.
Hypothyroidism, an under-active thyroid, occurs when the body produces too little thyroid hormones, causing a slowdown of the metabolism and creating unwanted weight gain.
Hyperthyroidism, an autoimmune disorder, occurs when
your body produces too much thyroid hormones, ultimately speeding up the metabolism and making it difficult to
maintain a healthy weight.