Culturelle® Immune Defense Chewables keep your immune system going strong all day long.* 4 Powerful ingredients are packed into a once daily chewable for super immunity. Culturelle® Immune Defense Chewables are powered by 10 billion CFU’s of LGG. Over 1,000 scientific studies and 30 years of research have demonstrated the safety and efficacy of this probiotic strain. In addition to LGG, the super immunity chewables are made from naturally-sourced Elderberry fruit juice, an ancient superfood, and contain an excellent source of both Vitamin C and Zinc.