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Islets of Langerhans contain beta cells and are located within the pancreas. Beta cells produce insulin. Insulin is the main hormone in the body that regulates glucose.

Review Date 11/19/2015

Updated by: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.