Yes, nonfat milk (also called skim milk and fat-free milk) is a good source of protein and provides the same vitamins and minerals as whole milk — with no fat. Because the fat portion of whole milk does not contain calcium, you can lose the fat without losing any calcium.
Reduced-fat (2%), low-fat (1%), and nonfat milk have vitamin A and vitamin D added, since these vitamins are lost when the fat is removed. Natural levels of vitamin D are low, so most milk producers add vitamin D to whole milk. Check the nutrition facts label to learn more about vitamins and minerals in milk.