While milk is a source of calcium, it certainly is not the ideal way to get your daily dose. Dairy products, with the exception of skim products, are loaded with saturated fat. Fat is directly related to heart disease and cancer. Dairy products are also high in protein. There are other reasons to worry about milk, too.
Cows are routinely fed antibiotics.
Dark green vegetables, such as broccoli and collard, mustard, and turnip greens are much better sources of calcium than milk. A single cup of broccoli contains almost a fourth of the U.S. RDA of calcium. Another good source is calcium-fortified orange juice. Beans and tortillas are also good sources of calcium. The risks and benefits should be discussed with one's doctor.