Turkey is an excellent source of lean protein and a good choice for a speedy lunch or dinner, but many packaged turkey slices are loaded with sodium. One 2-oz. serving of some brands contains nearly one-third of the maximum recommended daily sodium intake. So make sure you buy low-sodium varieties or opt for fresh turkey slices. If you can't roast your own, the best rule of thumb is to find a brand with less than 350 milligrams of sodium per 2-oz. serving.