* Focused on Food * Dietary Supplement * Vegetarian * Gluten-Free * Full Color Spectrum FoodBased Nutrition Essentials C-500 is Full Color Spectrum FoodBased Nutrition. The antioxidant-rich phenolic fruit concentrate and nourishing food base provide Essential Food Factors necessary for optimal bioavailability and utilization. The nutritional benefit to you is a naturally buffered and easy-to-digest vitamin C with optimal antioxidant capacity.