No. 1 doctor recommended brand for hydration. New! 4 Key nutrients for immune support. Zinc builds new immune cells. C vitamin promotes cell health. B12 vitamin helps activate immune cells. E vitamin supports cell membranes. Pedialyte is designed to prevent dehydration (Mild to moderate dehydration) more effectively than common beverages. Level per liter - Electrolyte sodium in Pedialyte compared to common beverages: Pedialyte Immune Support - Pedialyte AdvancedCare Plus; Pedialyte. Pedialyte AdvancedCare; Sports Drink; Soda; 100% Apple Juice. Water. Quickly replenish fluids and replace more of the electrolytes you may lose from dehydration (Mild to moderate dehydration) due to: Vomiting & Diarrhea. Heat exhaustion. Intense exercise. Travel.