Milk is very low in iron.
To get the U.S. Recommended Daily Allowance of 15 mg of iron, an infant would have to drink more than 31 quarts of milk each day. Milk also causes blood loss from the intestinal tract, depleting the body's iron. It is believed that these antibodies destroy the insulin-producing cells of the pancreas. Green leafy vegetables such as kale are as good or better than milk as calcium sources. Milk is frequently contaminated with antibiotics and excess vitamin D. Of 42 milk samples recently tested, only 12 percent were within the expected range of vitamin D content.