We’ve all been there: you’re digging through the fridge to find an ingredient for dinner and you stumble upon a yogurt you bought a few weeks ago. It was buried in the back and you forgot about it (oops!), so you check the expiration date. It was three days ago. What should you do? With more than 10 different types of date labels for food products—including sell by, best by, use by, expires by—it can be confusing. Do we take a whiff, nibble a small bite and hope for the best or just toss it?