The Food and Drug Administration has upgraded a December recall of Classic Lays Potato Chips to Class 1, the highest priority designated by the agency.

The FDA issued a product recall on Lay's Classic Potato Chips in two states. The recall was upgraded to the highest risk factor over undeclared milk.

A previous FDA recall on certain Lay's potato chip products has now been updated to the category with the highest risk for consumers. What to know

Class I, according to the FDA, means exposure to or consumption of the product could cause "serious adverse health consequences or death."

Frito-Lay is recalling bags of Lay’s Classic Potato Chips after the FDA increased the risk level of the product to its highest level of risk classification.

Those with an allergy or severe sensitivity to milk run the risk of a serious or life-threatening allergic reaction if they consume the recalled product,” the FDA said in its initial notice on Dec. 16.

Check your snacks before the Super Bowl. The Food and Drug Administration has given the highest risk classification to a recall for Lay’s potato chips. The FDA first announced the recall on Dec. 16 after Frito-Lay said a limited number of 13-ounce bags of Lay’s Classic Potato Chips may contain undeclared milk.

Lay’s voluntary recall from December has been increased to the U.S. Food and Drug Administration’s highest risk level classification. On Dec. 13, Frito-Lay recalled more than 6,000 bags of 13 oz. Lay’s Classic Potato Chips due to “undeclared milk.” The affected chips were sold in Oregon and Washington.

The FDA has issued a Class I recall for Lay’s Classic Potato Chips due to undeclared milk, warning of severe allergic reactions or death.

Urgent class 1 recall affects thousands of Lay's Classic Potato Chips bags due to undeclared milk allergen, posing severe health risks to sensitive consumers.

Frito-Lay recalls over 6,000 bags of Lay's Classic Potato Chips due to undeclared milk, posing serious health risks.