Is maltodextrin 100 natural

Maltodextrin is a low-molecular-weight polysaccharide (dextrose polymer). It is made by adding enzymes of certain bacteria to corn or potato starch, degrading it into smaller polymers (a process similar to how our bodies naturally break down starches). More than anything, maltodextrin is used as a thickener for food processing. It has no known side effects at all. It's even used as a binding agent in pharmaceuticals. Not all forms of dextrin are digestible, but maltodextrin is easily digested. So to answer your question, it is not what one would consider 100% natural, but it is basically harmless.