Is drinking milk healthy or unhealthy?

Can be.: It is a good source of calcium and protein. It is not healthy if you are allergic to milk. Milk increases calorie intake- non fat milk = 91 calories per cup. Low fat mild = 102 calories per cup. Whole milk = 146 calories per cup.

Milk healthy?: Milk from a cow is a good source of high-quality protein, and is fairly healthy (assuming you are tolerant of lactose) as long as you choose skim or 1% milk, both of which cut back the fat content and total calories significantly.