Cow’s milk allergy versus lactose intolerance

A mother with her little boy walks into your rooms and starts talking to you about his tummy problems. She thinks dairy is causing the trouble.

If so, the question is: what part of dairy is the issue? Is it the protein? Is it the lactose?  What is the difference?

Every 100ml of full cream milk contains about 3.4g of protein, 4.8g of carbohydrate and 3.4g of fat. There are no added sugars, the only carbohydrate present is lactose. The protein is made up of 80% casein and 20% whey and the fat is predominantly saturated, with some monounsaturated present. Milk also contains valuable fat soluble vitamins together