No. 1 Doctor recommended brand for hydration. Zinc, selenium & magnesium. 33% More electrolytes (60 mEq sodium electrolytes per liter vs 45 mEq in original Pedialyte). 3 Key nutrients for immune support and prebiotics to help promote digestive health. Zinc: Builds new immune cells. Selenium: Helps protect cells, Magnesium: Support immune response. Prebiotics: Support digestive health. Designed for fast, effective rehydration. Key nutrients for immune support (Nutrients include zinc, selenium, and magnesium). Pedialyte is designed to prevent dehydration (For mild to moderate dehydration) more effectively than common beverages. Level Per Liter: Pedialyte Immune Support; Pedialyte advanced care+; Pedialyte & Pedialyte advanced care; Sports drink; Soda; 100% apple juice; Water. Electrolyte sodium in Pedialyte compared to common beverages. Pedialyte quickly replenishes fluids, and replaces more of the electrolytes you may lose from dehydration due to: vomiting & diarrhea; heat exhaustion; intense exercise; travel.