Experts are alerting consumers against using a dozen cinnamon and spice powder brands after detecting high levels of lead contamination.

According to their results, the brands with the lowest risk of lead exposure include 365 Whole Foods Market Ground Cinnamon, 365 Whole Foods Market Organic Ground Cinnamon, Loisa Organic Cinnamon, Morton & Bassett San Francisco Organic Ground Cinnamon, Sadaf Cinnamon Powder, and Sadaf Seven Spice blend.

Lead occurs naturally, though how it ends up in the food supply is complicated. Other food products with have also had lead concerns recently.