Imagine a world where food on grocery store shelves is ranked by its healthiness, with simple, research-backed scores. In some countries, that world already exists. Nutrient profiling systems, or NPSs, support clear front-of-package labels that assess food quality based on nutrient content. Nutri-Score in France is a rainbow-colored system grading foods from A to E. Health Star Rating in Australia is a five-star system rating foods in half-star…