Multi-Probiotic® Spore + SBC is a unique combination of spore-based bacillus strains plus Saccharomyces boulardii (SBC). Both types of probiotics provide a clinically studied approach to supporting bowel comfort and regularity, gastrointestinal function, and immune health. Spore probiotics are more stable and behave differently than traditional probiotic species by germinating and proliferating in the small intestine.‡