The endocrine system comprises the thyroid, parathyroid, pancreas, ovaries, testes, adrenal, pituitary, and hypothalamus. These glands produce the hormones that control various activities of the body, such as reproduction, metabolism, growth, and development. The way the body responds to the environment is also controlled by hormones, which help to regulate the energy and nutrition the body receives to make it function properly.
Endocrinologists are doctors who are specially-trained to diagnose and treat glandular diseases and hormone imbalances, and help patients restore the body's normal hormonal balance. Professionally-trained endocrinologists have broad knowledge of clinical chemistry and biochemistry and use extensive scientific research to develop the best methods, drugs, and treatments for hormone-related disorders. The many conditions that require the help of an endocrinologist can be categorized as follows: