Fruits and vegetables contain soluble and insoluble fiber in varying proportions. When you eat soluble fiber, it absorbs water to form a gel-like mass, which helps you feel full and provides other health benefits. It prevents a surge in blood sugar after you eat by slowing down the absorption of carbohydrates.
If the blood glucose level falls to dangerous levels (as in very heavy exercise or lack of food for extended periods), the Alpha cells of the pancreas release glucagon, a hormone whose effects on liver cells act to increase blood glucose levels.
Glucagon and insulin are the two primary hormones â both produced by the pancreas â that stimulate or depress the level of sugar (glucose) in the blood. Insulin is apparently the less robust of the two, as more than 350 million people suffer from type 2 diabetes alone.