Question: Should I switch from whole milk to 2% milk?
Answer: No. 2% milk is a reduced fat product, not a low fat one. This means that although its total fat content is nearly 40% less than its whole milk counterpart, it still contains 5g of fat per serving (and 3g of artery-clogging saturated fat), and derives close to 35% of its calories from fat. To qualify as low fat, its total fat content must be 3g or less. It's fine to use 2% milk temporarily, as a means to stepping down from whole milk to 1% milk or, best of all, fat free milk. But if you are serious about eating a low fat diet, 2% does not cut it.