A formula thickener may have caused a condition that led to the deaths of seven infants, and the Food and Drug Administration is urging people not to use the product.

The FDA says infants may face an increased risk of developing the life-threatening condition necrotizing enterocolitis in which tissue in the intestines become inflamed.

Since May of 2011, at least 22 infants having consumed SimplyThick have developed the illness. A study is being conducted to determine if there is an actual link between consumption of SimplyThick and NEC. The FDA is urging anyone involved in the care of a baby to be aware of the risks until it has been proven safe or otherwise.

“SimplyThick is a brand of thickening agent-available to consumers and medical centers-used to help manage swallowing difficulties. It is sold in individual serving packets as well as in 64-ounce dispenser bottles, which can be purchased from distributors and local pharmacies throughout the United States,” according to a release from the FDA.