Food allergy is an immune response due to misjudgment of harmless food. On the other hand, food intolerance is a chemical reaction in which a body is unable to digest some types of food.

Glucose and Fructose are monosaccharides, whereas Lactose, Maltose and Sucrose are disaccharides. Glucose is classified as an aldehyde, whereas fructose as a ketone. Two glucose units are combined to form...