From a FoodDive online review:
Pure Market is offering consumers a chance to purchase products that have already been pre-graded in an effort to provide transparency and save time. Although the service just launched, it has reviewed the chemical compositions of several thousand products, with 805 in the food category and another 125 in beverages.
The service rates products in terms of purity, efficacy, accuracy and nutrition. Purity tests the level of contaminants in a product. Efficacy rates how well a product delivers on the promises on its label. Accuracy refers to the contents of the product being consistent with those on the label. Nutrition evaluates the ratio of “good stuff” to “bad stuff,” according to the website.