Pure Biotic 100Compare to Ortho Molecular Ortho Biotic 100 Pure Biotic 100 is a high dose probiotic delivering 100 billion active cultures for cases of gastrointestinal and immune distress. The GI tract is a finely balanced environment where roughly 500 different strains of bacteria compete for space and nutrients. When there is a healthy balance (eubiosis), few symptoms exist. However, dysbiosis can occur when an overabundance of potentially harmful organisms