Protect your core health every day with Culturelle Core health begins in the core of your body – the intestinal tract where 70% of your immune system resides. Diet, stress, travel and even some medications encourage bad bacteria to flourish in your intestinal tract. When bad bacteria overpower good bacteria, your digestive and overall health is open to a host of concerns. Culturelle, with Lactobacillus GG, one of the most studied probiotics (good bacteria) safely and naturally replaces the bad bacteria in your digestive tract for strong core health – healthier digestion and a stronger immune system. Significantly more probiotic per capsule than in a serving of yogurt. Safe & appropriate for children of all ages.