Every day our bodies are confronted with environmental factors that impact our defenses and overall health. With more than 70% of the body s immune defenses located in the digestive tract, maintaining a balanced intestinal environment is essential for boosting immunity and promoting optimal health.* This product combines 3 powerful ingredients that work synergistically to promote a balanced immune system and enhance your body s natural defenses during peak times throughout the year.*. S. boulardii immunobiotic: A beneficial probiotic yeast that works in the digestive tract to promote immune-system supporting healthy flora*. Stimulates the b.