Lethal Diet

A dietitian was once addressing a large audience in Chicago.
“The material we put into our stomachs is enough to have killed most of us sitting here, years ago. Red meat is awful. Some vegetables can be disastrous, and none of us realizes the chemicals in our drinking water. But there is one thing that is the most dangerous of all and we all eat it. Can anyone here tell me what lethal product I’m referring to?”
He scans the audience quickly and points to a man in the front row, “You, sir, why don’t you give us your guess?”
The man in the front row lowered his head and said, “Wedding cake?”