The nutrients found in milk are readily available from a wide variety of plant foods, including whole grains, fruits, vegetables, legumes, nuts and seeds. As a matter of fact, until refrigeration came along, the vast majority of humans and animals on the planet consumed little or no milk products. These people do not suffer from acute cow's milk deficiency disease, and have much lower rate of osteoporosis then the countries that consume dairy products. Dairy products are high in fat and like all animal fats very high in saturated fats. Unfortunately for consumers processed cow's milk found on the store shelf is purposely mislabeled to give the impression that it is low fat.
Cheeses are very high fat.
Also, if they skim the fat off one product it ultimately ends up in other food products. Cow's milk, like all animal products, also contains cholesterol. Iron deficiency is more likely on a dairy rich diet. Cow's milk products are very low in iron, thus, if they become a major part of one's diet, iron deficiency is more likely. In addition, clinical studies have shown that infants consuming cow's milk lose small amounts of blood from their digestive tracts.