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What is Insulin?

Hormone

Insulin is a peptide hormone that is produced by beta cells of the pancreas.

Function

Insulin regulates the metabolism of carbohydrates and fats. Insulin helps blood sugar enter the body's cells allowing glucose to be adsorbed by the muscles, fat and liver so it can be used for energy and signals the liver to store blood sugar for later use. Blood sugar enters the cells causing the levels in the bloodstream to decrease which signals insulin to decrease also. Insulin also helps the breakdown of fat and protein.