In a modern twist on a self-preservation tactic used by cautious kings and pharaohs, President Recep Tayyip Erdogan of Turkey is having his food tested before he eats — not by a human taster, though, but in the lab.

Mr. Erdogan’s physician, Dr. Cevdet Erdol, revealed this week that at least one of the thousand rooms in the president’s extravagant $600 million palace in Ankara, the capital, will hold a special food analysis laboratory to test the president’s meals for radioactive materials, poison or certain types of bacteria that could be used in an assassination attempt.