Dairy: Products that contain milk products and major cause of Lactose intolerance allergies.

Lactose intolerance is a digestive disorder caused by the inability to digest lactose, the main carbohydrate in dairy products. It can cause various symptoms, including bloating, diarrhoea and abdominal cramps. People with lactose intolerance do not make enough of the enzyme lactase, which is needed to digest lactose.