Our new low FODMAP Certified Advanced Probiotic & Prebiotic is the first combination Certified low FODMAP Probiotic & low FODMAP Prebiotic on the market. It is also one of the most effective Prebiotic / Probiotic formulations on the market, making use of two unique primary ingredients: PreforPre and Bacillus Subtilis DE111. Unlike conventional prebiotics, such as a type of fiber or starch, PreforPro is a lytic bacteriophage cocktail formulated to support healthy levels of good bacteria as opposed to unhealthy strains such as Escherichia Coli.