“An arrhythmia is a problem with the heart’s electrical system, which controls how the heart beats,” explains Segal.

Thyroiditis is when your thyroid gland becomes irritated. Hashimoto’s thyroiditis is the most common type of this health problem. It is an autoimmune disease. It occurs when your body makes antibodies ...

This little gland has a big job in your body—here’s how to get the nutrients you need to support its function.