What diseases are due to hormonal imbalances?

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Hormones are chemicals that direct the activities and functions of some cells or organs. These are released by the endocrine system, which consists of a number of glands (such as the pancreas, pituitary, adrenal, etc.) in our bodies. These hormones control key body functions related to our growth, reproduction, metabolism, etc. An excess or deficiency of these important chemicals can cause several diseases. Diabetes is caused by a deficiency of insulin, a hormone secreted by the pancreas. A lack or deficiency of insulin will cause glucose levels in our bloodstream to increase. Hypothyroidism is caused by a deficiency of thyroid hormones (secreted by a thyroid) and results in a very slow metabolism. Hyperthyroidism, on the other hand, is caused by excess thyroid production and causes rapid weight loss, heightened heart rate, etc. 

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