the overall nutritional quality index was a nutritional-rating system developed at the yale-griffin prevention research center. it assigned foods a score between 1 and 100 which reflected overall nutrition relative to calories consumed. marketed as nuval, it was widely adopted in united states grocery stores before it was discontinued in 2017 amid accusations of conflicts of interest and for its refusal to publish the scoring algorithm. scoring inconsistencies occurred, in which processed foods scored higher than canned fruits and vegetables.