developed by reviver, a nutritionally-oriented restaurant in new york city, the reviver score expresses nutrient density of menu items relative to calories from a variety of fast-food and casual restaurants based on ten nutrients: vitamins a, c, and e, folate, calcium, magnesium, potassium, iron, fiber, and omega-3 fats. a score of 100 indicates that a meal provides at least 100% of the recommended daily intake for all ten nutrients, proportional to its energy (calorie) content.