Pro-Biotics 8x10 & Fiber with FOS has live active cultures that survive stomach acid and lower digestive tract and provide the intestines with beneficial flora. Prescribed For Life's Probiotics 8x10 has 10 billion organisms per serving and 8 highly viable live strains. The Organic Probiotics 8x10 & Fiber (12 oz) package is a natural probiotic powder from organic agave inulin sources (FOS = Fructooligosaccharides). This can be used by many individuals as a source of protein outside of their general diet to strengthen bones, control weight, and avoid muscle deterioration, in addition to the good bacteria benefits. The Prescribed for Life Probiotics 8x10 & Fiber in a 12 oz package (including: Acidophilus, Bifidum, Casei, Rhamnosus, and more) is very popular among vegetarians or those who prefer a limited meat diet because it provides a stable source of protein that they are otherwise lacking. We use only GMO-Free (Contains NO Genetically Modified Organisms and/or Ingredients) and FDA GRAS rated ingredients (Generally Recognized as Safe). This ingredient may be added to foods and beverages or smoothies and green drinks. It is a pure, fine white powder and has no additives or preservatives. Various sizes available for personal use and quantity discounts available on bulk-packed foods and food powders for commercial uses. Only the highest quality natural food and bulk ingredients are sourced through family-owned Prescribed For Life Nutrition. Thank you for shopping with us and please come again!