When shopping for deli meats, you might look for options that specify no added nitrates. But what are nitrates, and does it matter if they're there?

They’re found in fruit, veg and cured meat, but why is it that we are warned against eating some foods with nitrates and nitrites in, but we’re told to fill our fridges with others?

Americans love hot dogs, but sometimes we'd rather not think too hard about what’s inside. Thankfully, these six hot dog ...