Whole Food Dietary Supplement. Natural Banana Flavor 2 Month Supply! Primal Defense® Kids is a combination of prebiotics and probiotics that supports normal bowel function and a healthy immune system.* This unique formula uses 3 Bifidobacteria strains that have been clinically studied in children and are found in a healthy child s digestive tract. The Saccharomyces boulardii in Primal Defense® Kids supports the normal ability of the intestinal cells to break down lactose, a milk sugar.* Inulin, a prebiotic, supports growth of friendly intestinal bacteria and maintains healthy calcium absorption to support your child s growth.* Most importantly, Primal Defense® Kids is made with a hint of organic banana, so kids will love the taste.* Contains no artificial colors, preservatives, or.