Youtheory® Spore Probiotics are the next generation of probiotic supplements, designed to survive and thrive when exposed to extreme environments like stomach acid. An impermeable shell protects the Spore Probiotics until they reach their target your intestinal tract. It's a natural barrier that protects the probiotics from stomach acid, bile salts and unfriendly bacteria. Spore technology is a better, natural way to replenish the body's microflora offering multiple advantages over traditional probiotic preparations.*