This will bring a great deal of attention to the public health potential of reformulating foods to create healthier products.

According to one study, nearly 85 percent of the products with specific shout-outs about their nutritional virtues were unhealthy by the evaluators' objective standards.

Walmart announced changes that will improve the nutritional quality of the food supply. By 2015, all stores will be free of artificial trans fat and there will be enormous pressure on the rest of the food industry to follow suit.

WASHINGTON — Wal-Mart, the nation's largest grocer, says it will reformulate thousands of products to make them healthier and push its suppliers...