Milk is described as complete food but it is important to know that it takes longer to digest. Some people are lactose intolerant and won't be able to digest milk properly. Here are some food items you should never consume with milk to ensure proper digestion. Avoid eating bananas with milk as it takes a long time to digest and person might feel fatigued. Milk acts as a laxative and melons have diuretic properties. Combining them in a diet can cause vomiting. Same is true in the case of radish and milk.