Ensure Immune Health has Immune Balance to help promote digestive tract health and to help support the immune system. Ensure Immune Health can benefit patients who have malnutrition, are at nutritional risk, have a weakened immune system, or are experiencing involuntary weight loss. A source of Complete, Balanced Nutrition. Immune Balance, a unique blend of prebiotic fiber to help promote digestive tract health and antioxidants to support the immune system.