Lactose is a disaccharide, a sugar that is formed when glucose and galactose, simpler sugars or monosaccharides undergo a condensation reaction. This disaccharide is found in the milk of mammals and provides a source of energy for infants that rely on their mother’s milk and acts as a substitute to solid foods and provides nutrition. Lactose is digested, absorbed by the small through the help of the enzyme lactase. This is imperative as it cannot be absorbed in its plain form and so must be broken down into simpler sugars. This reaction is called a hydrolysis reaction in which water that is formed as a by-product in a condensation reaction is used to breakdown the covalent bond in the disaccharide, known as the glycosidic linkage, to form two