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,

Frito-Lay has recalled over 6,000 bags of Lay’s Classic Potato Chips due to undeclared milk, which poses a serious risk to individuals with dairy allergies. The FDA upgraded the recall to Class I—the highest risk level—after determining the chips could cause life-threatening allergic reactions,

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.