Go with Your Gut! Probiotics are the organisms that colonize the digestive tract, found in nutritious foods like yogurt. A high-quality probiotic formula can bring you a balanced blend of friendly bacteria that works best with your nutrition plan. Introducing PipingRock Probiotic-14, a next generation probiotic formula. This premium supplement features a targeted 14 strain complex with 50 billion active organisms plus FOS prebiotic in each serving.