With serious questions about mercury levels and confusing labels, it’s hard to navigate which canned tuna is best. We decode which canned tuna to buy for both health and flavor. Plus, could eating more salt actually save your life? The controversial claim one scientist is making.

We've all been there — we get a cramp in our stomach, maybe with some nausea or constipation. It's easy to think it may just be indigestion. But what if it's something more serious like diverticulitis? That's a condition of inflammation or infection in one or more small pouches that can form in your digestive tract. Here's how to tell the difference between the pain and how to know when you should see a doctor.