Primal defense helps promote healthy digestive balance, support normal absorption and assimilation of nutrients, and help maintain a healthy immune system. Designed to balance gut flora, support gastrointestinal and immune health. Primal Defense is Garden of Life's original probiotic formula that is recognized as a leading probiotic in the health food industry with over 4 million bottles sold. It is a unique HSO probiotic formula. In order to obtain the benefits that they historically acquired from consuming foods cultivated in healthy soil, Garden of Life developed a Homeostatic Soil Organism (HSO) Probiotic Blend utilizing 12 species of beneficial microorganisms including Bacillus subtilus, along with fermented grasses and ionic minerals. It is recommended for adults to take 1 caplet 3 times per day with 8 ounces of water. Best taken on an empty stomach. Begin with 1 caplet per day and gradually increase to suggested amount. Not intended for children.