Over 70% of your immune system response comes from your gut. Your gut is your first line of defense in the daily battle against colds, flu, life-threatening illnesses and pathogenic invaders. So it's not just your digestion that's affected by your gut. It's your overall health and disease prevention. ProBiotein can help support improved nutrient utilization. Made from organic whole wheat, oats and flax, plus organic barley malt, ProBiotein is an all-natural, non-GMO, multi-prebiotic fiber source. Other brands of prebiotics often include artificial flavorings or chemical additives. And almost all have only 1 prebiotic fiber. ProBiotein has 4 plus Beta-glucan.