I eat yogurt instead of drinking milk, as the active cultures in yogurt digest much of the lactose. Lactose is the main problem with milk, although the high ratio of calcium to magnesium can be an issue if you drink large amounts of it. I can tolerate small amounts of lactose, such a perhaps a cup or less of milk, but if I drink a quart of milk I will probably get severely flatulent. There are lactose reduced milks and LactAid pills if you really want to drink milk and have a problem digesting it.