This is an informative article on the downsides of ingesting milk, from calories, to lactose intolerance to deadly alleries, to heartburn, to wasting of resources and tax money.   I urge you to read it in its entirety, and will just provide a short excerpt.
July 7, 2012, 3:56 pm
Got Milk? You Don’t Need It
By MARK BITTMAN

Drinking milk is as American as Mom and apple pie. Until not long ago, Americans were encouraged not only by the lobbying group called the American Dairy Association but by parents, doctors and teachers to drink four 8-ounce glasses of milk, “nature’s perfect food,” every day. That’s two pounds!..

Today the Department of Agriculture’s recommendation for dairy is a mere three cups daily – still 1½ pounds by weight – for every man, woman and child over age 9. This in a country where as many as 50 million people are lactose intolerant, including 90 percent of all Asian-Americans and 75 percent of all African-Americans, Mexican-Americans and Jews. The myplate.gov site helpfully suggests that those people drink lactose-free beverages. (To its credit, it now counts soy milk as “dairy.”)..