It has low water activity. Basically that means it doesn’t really have enough water to support life. Like potato chips or crackers they don’t get moldy as long as the bag is sealed and air (which contains water) is kept away. The low water activity means that it acts like salt, sucking the water out of stuff and dehydrating it, and nothing really grows in those conditions (those spores are not killed by it, that’s why you can’t give honey to babies)
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