The RDA is 125 to 175 g. The brain alone consumes about 120 g of glucose per day Carbohydrate consumption in the United States has become quite excessive over the past century due to a combination of fondness for sweets, increased use of sugar in processed foods, and reduced levels of physical activity. The three disaccharides are sucrose, lactose, and maltose. Outside of the hepatic portal system, glucose is the only monosaccharide present in the blood in any quantity, and is thus known as blood sugar. Fiber Dietary fiber refers to all fibrous materials of plant and animal origin that resist digestion.
Most fiber is from cellulose, pectin, gums, and lignin, all derived from plant matter.
Fiber is an essential component of the diet. It binds and carries away toxins and other undesirable chemicals, thus reducing the risk of colon cancer. Fat accounts for most of the body's stored energy. Vitamins A, D, E, and K are fat-soluble vitamins that depend on dietary fat for their absorption by the intestine. Phospholipids and cholesterol are major structural components of plasma membranes and myelin.