Dairy intolerance is a lot more common nowadays, but why is that? It never used to be so prevalent. Dr. Martin suggests that the problem is not with dairy itself, but with the individual's gut health. The pasteurization and homogenization of milk, along with the overuse of antibiotics, have led to a decrease in beneficial gut bacteria, leading to dairy intolerance.  Join Dr. Martin as he discusses germ theory and explains what happened to dairy.