The top choice for professionals and most sought after probiotic on the market. 100% pure, tested for safety and efficacy. Human form bacteria strains so your body recognizes it. Maintenance dose probiotic, 2.5 billion CFU, 4 strains, no FOS (fructooligosaccharides/pre-biotics) Indicative for an individual with chronic infection (fungus, yeast, colds, flu), fatigue and lowered immune system. Not from an animal source. Human form is clinically proven to cultivate faster and more healthy bacteria than an animal source. Capsules are 100% pure vegetable sourced. Take 1 per day.