Lactose is a disaccharide sugar made up of a combination of galactose and glucose. Lactose is found primarily in milk (dairy) foods.
At an early age almost everyone has the ability to digest lactose since it is an important source of energy from breastmilk. Later on in life, however, some people lose the ability to digest lactose and suffer from lactose intolerance. (1)
Symptoms of lactose intolerance include gas, diarrhea, and bloating. (1)
Foods high in lactose are those which contain milk. These include ice-cream, milk puddings, hot chocolate, eggnog, macaroni and cheese, yogurt, pancakes, milk chocolate, cottage cheese, and mashed potatoes. (2) Below are the top 10 foods highest in lactose.