Carbohydrates in the diet 128

Carbohydrate digestion 129

Hypolactasia/lactose intolerance 130

Congenital sucrase–isomaltase deficiency 130

Glucose–galactose malabsorption 131

Confirmation of diagnosis of carbohydrate malabsorption 131

Carbohydrates make up at least half the energy intake in the diet. The principal carbohydrates are the storage polysaccharides (starch, glycogen and cellulose), the disaccharides lactose and sucrose, and the monosaccharides glucose and fructose....