Is the cinnamon on your shelf safe? The FDA says these 16 brands contain elevated levels of lead.

Certain brands of one of the country's most popular spices, cinnamon, could be hazardous to your health.

In the last week, the Food and Drug Administration has identified four additional makers of ground cinnamon it says contain elevated levels of lead. In all, the agency has listed 16 labels as having concerning amounts of lead. The new additions include brands HAETAE, Roshni, Durra and Wise Wife.

"Based on the FDA's assessment, prolonged exposure to these products may be unsafe and could contribute to elevated levels of lead in the blood," the government agency says in its alert.

The FDA said it has asked all companies — with the exception of HAETAE — to voluntarily recall the products.

So far, 10 of the 16 ground cinnamon brands identified by the FDA have issued recall announcemen