Maltodextrin can come from corn, rye or wheat and is a complex carbohydrate, meaning it contains more than a single molecule. Maltodextrin has a high glycemic index, like sugar, so we recommend minimizing it. A GMO is a genetically modified organism. We use only non-GMO maltodextrin made from the white part of corn kernels. When beaten into a powder form, non-GMO maltodextrin is a great "carrier" of our formula. We can provide our formula utilizing only 3 grams per 8-ounce serving, thus keeping with our intention to minimize carbohydrates. If we used agave nectar or honey, or another natural carbohydrate as a carrier, we would need a minimum of 17 grams of carbohydrate per 8-ounce serving. This would require too much time for absorption and thus nullify our advantage.