The U.S. Food & Drug Administration has issued an urgent update about a mass recall concerning more than 1.5 million bags of shredded cheese.

The Great Lakes Cheese Co. Inc. of Hiram, Ohio, initially issued a voluntary recall on Oct. 3 over possible contamination of metal fragments, which pose a risk of internal injury if eaten.

On Dec. 1, the FDA reclassified the recall’s risk level to “Class I” to signify that consuming the products “may cause temporary or medically reversible adverse health consequences.”

The affected shredded cheese products came in five different varieties and were sold under dozens of brand names at Target, Walmart, Aldi and other major retailers across the U.S. and Puerto Rico.

Read on to learn more about the recall.

Which Shredded Cheese Products Were Recalled?

The affected products include five different styles of shredded cheeses sold in various sizes and with various best-by dates under the following brand names:

Shredded Mozzarella Cheese

  • Always Save Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Borden Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Borden Thick Cut Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Brookshire’s Finely Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Brookshire’s Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Brookshire’s Thick Cut Low-Moisture Part-Skim Mozzarella Cheese
  • Cache Valley Creamery Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Chestnut Hill Fancy Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Coburn Farms Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Econo Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Food Club Finely Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Food Club Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Food Lion Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Gold Rush Creamery Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Good & Gather Fine Cut Low-Moisture Part-Skim Mozzarella Cheese
  • Good & Gather Classic Low-Moisture Part-Skim Mozzarella Cheese
  • Great Lakes Cheese Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Great Lakes Cheese Finely Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Happy Farms by Aldi Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • H-E-B Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • H-E-B Thick Low-Moisture Part-Skim Mozzarella Cheese
  • H-E-B Shredded/Fancy Finamente Rallado Low-Moisture Part-Skim Mozzarella Cheese
  • Hill Country Fare Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Know & Love Fine Cut Low-Moisture Part-Skim Mozzarella Cheese
  • Know & Love Classic Cut Low-Moisture Part-Skim Mozzarella Cheese
  • Know & Love Thick Cut Low-Moisture Part-Skim Mozzarella Cheese
  • Laura Lynn Finely Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Laura Lynn Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Laura Lynn Thick Cut Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Lucerne Dairy Farms Finely Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Lucerne Dairy Farms Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Lucerene Dairy Farms Rustic Cut Low-Moisture Part-Skim Mozzarella Cheese
  • Nu Farm Fancy Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Pubix Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Schuck’s Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Simply Go Classic Cut Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Simply Go Rustic Cut Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Sprouts Farmers Market Finely Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Sprouts Farmers Market Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Statre Bros. Markets Finely Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Stater Bros. Markets Shredded Low-Moisture Part-Skim Mozzarella Cheese
  • Sunnyside Farms Shredded Low-Moisture Part-Skim Mozzarella Cheese

Shredded Italian-Style Cheese

  • Happy Farms by Aldi Italian-Style Shredded Cheese
  • Brookshire’s Italian 6 Cheese Finely Shredded
  • Cache Valley Creamery Six Cheese Italian Finely Shredded
  • Coburn Farms Italian Style Finely Shredded
  • Great Value Italian Style Finely Shredded
  • Know & Love Italian Style Fine Cut
  • Laura Lynn Italian Blend Finely Shredded
  • Publix Italian Six Cheese Blend Fancy Shredded
  • Simply Go Italian Style Six Cheese Blend Fine Cut Shredded

Shredded Pizza-Style Cheese

  • Food Club Finely Shredded Pizza Style Four Cheese Blend
  • Econo Pizza Shredded
  • Food Club Pizza Style Two Cheese Blend Finely Shredded
  • Food Club Pizza Style Two Cheese Blend Shredded
  • Gold Rush Creamery Pizza Blend Shredded
  • Great Value Pizza Blend Shredded
  • Laura Lynn Pizza Blend Finely Shredded
  • Simply Go Pizza Blend Two Cheese Mix Classic Cut Shredded

Mozzarella and Provolone Shredded Cheese Blend

  • Freedom’s Choice Pizza Blend Fine-Cut
  • Good & Gather Mozzarella & Provolone Classic
  • Great Lakes Cheese Mozzarella & Provolone Shredded
  • Great Value Provolone & Mozzarella Blend Shredded

Mozzarella and Parmesan Shredded Cheese Blend

  • Good & Gather Mozzarella & Parmesan Shredded Cheese Blend

A full list of the products, their sizes, UPCs and best-by dates can be found on the official FDA website.

Why Were the Products Recalled?

The products were recalled over potential contamination with metal fragments, which can cause internal injury if eaten.

Where Were the Products Sold?

The shredded cheese products were sold at at Aldi, Target, Walmart and other major retailers in Alabama, Arkansas, Arizona, California, Colorado, Florida, Georgia, Idaho, Illinois, Indiana, Kansas, Kentucky, Louisiana, Minnesota, Mississippi, Missouri, North Carolina, Nebraska, New Mexico, Nevada, New York, Oklahoma, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Utah, Virginia, Washington, Wisconsin and Puerto Rico.

What to Do If You Purchased Affected Products

The FDA urges consumers who purchased the affected products not to eat them.

Consumers should throw away the products — including any they may have placed in their freezers — or return the products to the place of purchase for a refund.