Hormone A chemical substance produced in one part of the body that is released into the blood to control functions of another part or parts of the body. Examples include insulin, estrogen, and adrenaline/epinephrine. Related Articles: Episode 11: A Real Diabetes Patient Story with JoeGLP-1 Receptor AgonistsEpisode 10: Staying Active with DiabetesErectile DysfunctionEpisode 12: Medications for Type 2 Diabetes