Greek gleukos, sweetness). Glucose is a 6 carbon sugar found in many fruits, other plants, and in the blood of animals. Glucose is also known as dextrose. Glucose is the primary fuel of the the brain and many other tissues in the human, In the human, glucose metabolism is controlled by several hormones, most notably insulin. Insulinm, produced in the pancreas, causes glucose to to be distributed and used throughout the body. See insulin. Since glucose is used as a primary energy source in the human, after a carbohydrate meal is consumed, glucose from the carbohydrate source leaves the intestine and enters the blood. Some of the glucose is immediately used for energy. The excess glucose glucose is stored primarily in the liver and muscle tissue as glycogen. Glycogen is the storage form of sugars. See glycogen. Only so much glycogen can be made from glucose, and after this threshold is met, the remaining sugars are converted to deposited fat. This is the premise for dieting and balancing the amount of carbohydrates consumed. However, there is no RDA in regards to carbohydrates considering need of sugars will vary depending on how active an individual is.