Advanced Nutrition by Zahler Advanced D3 Formula Supports Healthy Bones and Immune System General Health Dietary Supplement Feel Better, Everydayâ„¢ Non-GMO Kosher Pareve Gluten Free Dairy Free Soy Free Made in a GMP Facility Vegetarian Friendly Vitamin D3 Vitamin D3 is a crucial nutrient for overall health. Yet, a typical diet does not provide the recommended amount of this vitamin. In addition to supporting bone and immune health, research shows that Vitamin D3 supports general health and wellbeing.