He said that once. Clearly allegorical.
He said it was His body many times and did not clarify to the contrary even when confronted with dissent.
All of Christendom knew what He meant until the Reformation.
Amazing, really, that the "bible alone" crowd works so fervently to deny Christ's clear words and limit what He can and cannot do to fulfill His promise to us.
The bread is Jesus' sacrifice for the sins of the world. Unless a person "partakes" through faith in Jesus' death, he cannot have eternal life.
Just because the catholic folks think they were the first, doesn't mean they got it right.