The F.D.A. is investigating the sources of cinnamon and other ingredients produced outside the U.S. as the possible cause of lead poisoning in dozens of children. Advocates are urging mandatory testing of lead in food.The F.D.A. is investigating the sources of cinnamon and other ingredients produced outside the U.S. as the possible cause of lead poisoning in dozens of children. Advocates are urging mandatory testing of lead in food.Read MoreHazardous and Toxic Substances, Lead, Recalls and Bans of Products, Food Contamination and Poisoning, Cinnamon (Spice), International Trade and World Market, Food, Regulation and Deregulation of Industry, Children and Childhood, Supply Chain, Environmental Defense, Food and Drug Administration, WanaBana, Weis Markets IncNYT > Health