ReliefBiotic from Natural Factors is a multi-strain product with 7 billion colony-forming units (cfu) of probiotics, including strains of Lactobacillus, Bacillus and Enterococcus whose properties have been proven to alleviate certain symptoms of irritable bowel syndrome. This innovative preparation also helps reduce the risk of antibiotic-associated diarrhea, and is designed for long shelf-life - without refrigeration!