Hormones are chemical messengers that are produced by glands in the body, including the pituitary gland, thyroid gland, and adrenal gland. They help regulate various bodily functions, including metabolism, growth and development, sexual function, and mood. Hormones can be influenced by a variety of factors, including stress, diet, and exercise, and imbalances in hormones can lead to various health conditions. Hormone therapy is sometimes used to treat hormone-related conditions.