Overview. Milk allergy is an abnormal response by the body's immune system to milk and products containing milk. It's one of the most common.
Lactose intolerance and dairy allergy are not the same thing. Lactose intolerance is common in adults – about 30 million Americans have it.
Milk contains water, proteins, minerals, fats and carbohydrates (lactose is the milk sugar). Those who are allergic to milk have a reaction to the proteins, which in.