Futurebiotics Longest Living Acidophilus contains a unique blend of lactobacilli strains, including potent Lactospore. Delivering viable live probiotics to the intestinal tract is a formidable technical challenge. Lactospore is a naturally microencapsulated sporiferous preparation of Lactobacillus sporogenes that is proven to deliver viable lactobacilli to the intestine. It is room-temperature stable and highly resistant to the action of heat, gastric acids and bile. 100% vegetarian.