PrebioMax Natural Sour Apple 60 TabletsPromotes Beneficial Gut Microbiota* PrebioMax provides the gastrointestinal tract with xylooligosaccharides (XOS), prebiotic fermentable fibers that promote a healthy balance of gut microbiota to help maintain digestive health.* Download Product DRS Formulated to Exclude: Wheat, gluten, soy, animal and dairy products, fish, shellfish, peanuts, tree nuts, egg, ingredients derived from genetically modified organisms (GMOs), artificial colors, artificial