Probiotic Ultra Plus 350 and Probiotic Ultra Plus feature a diverse blend of HOWARU® and FloraFIT ® probiotic strains to support a healthy gut microbiome. Each strain is well-researched and identity-verified and has been genetically characterized and properly classified for your safety and assurance. These strains were not only selected for their health benefits and complementary actions but also for their viability and stability. To protect the bacteria from light and moisture, opaque and foil-lined packaging is utilized for both formulas.*