For example, Panera Bread's Tuna Salad Sandwich contains 1,670 milligrams of sodium, which is over half an adult's daily recommended allowance. And it's not just salt; restaurants also serve tuna ...

Read more: 10 Things You Probably Didn't Know About Oysters There are dozens of ways to prepare tuna salad, so once you've picked up your water-packed fish and squeezed it dry, you need to decide how ...