Lots More Information Prev Next Related HowStuffWorks Articles How Food Preservation WorksHow Food WorksHow do they make marshmallows?What exactly is Jell-O made from? How does it work?Where do corn oil and corn syrup come from?What is baking powder and how does it work? More Great Links What Are Seaweeds?Maine Seaweed Company Up Next Can you buy deli meat without preservatives? Why do processed meats spoil so quickly? How Dehydrated Food Works How Flavor Enhancers Work What's vanishing caloric density?