Does vitamin d milk weigh more than low fat milk?

By volume yes. They take out the fat to make skimmer milk. Fat has weight and when removed from the milk... it weighs less. * All milk in the Unites States is "Vitamin D" fortified. Whole milk is the one with the most cream, at 3.5% milkfat, and therefore the most fat. However, reduced-fat (2%), light or lowfat (1%), and fat-free milk must all have Vitamin A and Vitamin D added.