Final Word of Warning: There is some debate about the potential side effects of excessive milk consumption. From research on prostate cancer to Parkinson’s disease and CMA (Cow’s Milk Allergy), there are valid claims and research that shows cow milk to be dangerous under very specific conditions and consumption levels. Before making a major boost to your milk intake, speak to your doctor, who may understand more about possible effects of milk on your system. However, for most people, milk is a very wise choice for your daily diet.