Several popular salad dressings have been recalled over concerns that they could potentially contain "foreign objects," according to an alert shared by the U.S. Food and Drug Administration.

Ventura Foods, a company based in Irvine, California, initiated a voluntary recall last month amid total 3,556 cases of seven different varieties of salad dressing containing "black plastic planting material" in granulated onion, a key ingredient, according to the FDA. The types of salad dressing involved in the recall are included below:

Creamy Poblano Avocado Ranch Dressing and Dip
Ventura Caesar Dressing
Pepper Mill Regal Caesar Dressing
Pepper Mill Creamy Caesar Dressing
Caesar Dressing served at Costco Service Deli
Caesar Dressing served at Costco Food Court
Hidden Valley, Buttermilk Ranch

The recalled salad dressings were reported to be distributed to Costco, Publix and five other retailers at 42 store locations in 27 different U.S. states, which are included below:

Arkansas
Colorado
Florida
Georgia
Illinois
Indiana
Kansas
Kentucky
Louisiana
Maryland
Michigan
Minnesota
Missouri
Nebraska
New Hampshire
New Jersey
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
South Carolina
Texas
Virginia
Washington
Wisconsin

Costco issued an alert in November notifying its members of recalled Ventura Foods dressings, advising that consumption be stoped immediately and products could be returned to stores for a full refund, according to CBS News.