I know that expiration dates are there for a reason, but in general, how far past can you go and still be safe? Drugs are usually good for almost 2-3 past the expiration date stamped on the box. What about yogurt? Bread? Milk? What about cooked foods stored in the fridge? I told a friend recently he'd be fine eating a five day old burrito if he "just heated it up a lot to kill anything that might have grown" and was firmly chastized by a nutritionist for my bad advice.