Research shows that without adequate fiber in the gut, organisms that need it, will utilize the guts mucosal layer for nourishment. This allows for harmful bacteria to latch onto the wall, preventing good bacteria from doing so. Whole, natural fiber works best to protect the mucosal layer, per researchers. Examples are Chia seed, Berries, Vegetables (broccoli and brussels sprouts,root vegetables and tubers, including onions and sweet potatoes), Almonds, Psyllium seed husk, flax, and chia seeds green beans, Cauliflower, Beans, Peas etc..
http://www.nutraingredients-usa.com/Research/Whole-natural-fiber-works-best-to-protect-gut-mucosal-layer
