Fructose and glucose are two of the most common types of SUGARS found in nature. They are both monosaccharides, meaning they are simple SUGARS that cannot be broken down into simpler forms. Fructose is a sweet-tasting sugar found in fruits, honey, and some vegetables, while glucose is a sugar found in many foods, including grains, fruits, and vegetables. Both fructose and glucose are important sources of energy for the body and are essential for proper metabolism.