Cows are given antibiotics and injected with rBGH, a genetically engineered Bovine Growth Hormone , which is a synthetic hormone that was created to artificially increase milk production. A frightening side effect of rBGH is an increase in IGF-1 (insulin growth factor), which has been linked to many cancers. Cows are routinely given steroids and other hormones to plump them up. These potent synthetic hormones disturb the delicate human hormonal balance, leading to a lot of medical problems. Toxic pesticides from food that cows ingest also make their way into the milk, which humans unknowingly consume. Many cows live in confined and inhumane conditions, not being allowed to freely roam and graze the natural green grass they are intended to eat. Though organic milk may be free of antibiotics and rBGH, all the other negative attributes of milk are still present.