Hormones are chemical messengers that are produced by the endocrine system and released into the bloodstream. INSULIN is a hormone that helps regulate the amount of glucose in the blood, and is produced by the pancreas. Aldosterone is a hormone produced by the adrenal glands that helps regulate sodium and potassium levels in the body. ADRENALINE is a hormone produced by the adrenal glands that helps the body respond to stress. Secretin is a hormone produced by the small intestine that helps regulate digestion. Endocrin is a hormone produced by the endocrine system that helps regulate metabolism.