These probiotics by Dr. Westin Childs provide high doses for the regulation of gut function and to help support your intestinal tract. Ultrabiotic x100 is a high-dose daily probiotic that contains 4 species at 100 billion CFU ideal for daily probiotic use and regular maintenance of the gastrointestinal tract. Gut Bomb 350 Billion is a powerful weight loss probiotic with 18 different strains designed to act as a bomb to help bring unhealthy guts back into balance.