The pancreas is about six inches long and is nestled into the curve of the duodenum(part of the small intestine). Its cell clusters secrete insulin, which accelerates the burning of sugar in the body. Insulin is secreted into the blood, not the digestive tract. The larger part of the pancreas manufactures and secretes pancreatic juice, which contains some of the body's most important digestive enzymes-lipases, which split fats; proteases; which split protein; and amylases, which split starches. As we age these three enzymes diminish, which are necessary for digestion and good health, requiring the need for supplementation.