Shrimp
The shrimp you see at the seafood counter, piled atop a mountain of ice, may look more enticing than a plastic bag of frozen shrimp alongside the fish sticks and salmon fillets. Truth is, though, frozen shrimp is just as good and healthy for you as fresh, thanks to flash frozen-at-sea technologies—and it's usually cheaper by a few dollars per pound too. Furthermore, Linda Cornish, president of Seafood Nutrition Partnership, says that most shrimp sold as fresh arrived at the store frozen and was then defrosted for customers (you may see the label "previously frozen").