It's gotta be local to your region. So we're in northeast Ohio, ideally I want to get honey from bees that are within 15 to 20 miles of our home. And it should be raw; the pasteurization process takes all the good stuff out of it and it becomes useless at that point. But I can tell you first hand that it does work. The logic is that the pollen and allergens that affect you adversely are those in your area, and the honey made from those very allergens give a sort of immunity effect when eating it. It builds up in your body until you're less bothered by it. That's what I read, anyway.