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Advanced Nutrition by Zahler®Supports Health Bones & Immune SystemChildren's HealthDietary SupplementChewableFeel Better Everyday™Kosher PareveNon-GMOGluten FreeDairy FreeSoy FreeSupports Healthy Bones & Immune System Vitamin D3 is the only vitamin the body can manufacture from sunlight (UVB rays). This life- sustaining bone-building and immune-modulating vitamin is a crucial nutrient for overall health.