L. acidophilus NCFM® was first isolated from a human source in the early 1970s. NCFM® has been safely investigated in more than 330 scientific studies, including more than 60 human clinical trials as a single entity and in combination with other probiotics and prebiotics. It has been studied alongside other strains as a component of the HOWARU® Restore Blend (NCFM®, Lpc-37™, Bi-07™, Bl-04®) for digestive health and with Bi-07™ for pediatric immune health.1,2 The subjects in these trials have ranged from infants to aging populations (from 6 months to over 65 years of age). It has a long history of safe use, is well suited for intestinal survival, and has strong adhesion to intestinal cell lines.3,4