Federal regulators have upgraded a product recall of Lay's Classic Potato Chips to the highest risk level for a batch that may contain undeclared milk ingredients. Last month, Frito-Lay issued a recall warning that more than 6,

The FDA has upgraded a recall of Lay’s Potato Chips to the highest level possible, meaning consuming the chips will cause adverse health consequences. In December, Texas-based food manufacturer Frito Lay recalled a limited number of Lay’s Classic 13oz because the product could contain undeclared milk ingredients.

The Food and Drug Administration just raised the recall level of Lay’s Classic Potato Chips to the highest risk classification. Frito Lay issued a recall on Dec. 16 through the FDA for over 6,000 bags of Lay's Classic Potato Chips that contained "undeclared milk.