Hormone

A hormone, such as insulin or estrogen, is a substance released by an organ or tissue that controls the activity of organs or cells in another part of the body. The organs or glands that release hormones are part of the endocrine system.

Hormones may also be taken as medications, such as birth control pills or estrogen replacement therapy.

Last Updated: May 14, 2008

Author: Sandy Jocoy, RN

Medical Review: Sarah Marshall, MD - Family Medicine & Siobhan M. Dolan, MD, MPH - Reproductive Genetics

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