My body has plenty of insulin, but for some reason, when my body breaks down sugars, the insulin isn't as effective. When I eat something higher on the GI index, something with a lot of simple sugars, the cinnamon prevents my sugar from running too high. I don't know the exact mechanism, but my sugars used to be in the 90s, now they're in the 70s fasting since I began taking 2 cinnamon capsules before each meal.