IS IT A BLIMP? NO, IT'S SUPERMAN!

Fears for Dean Cain as fading actor packs on the pounds

SUPERMAN never carried an ounce of flab — but his alter ego Dean Cain has piled on an unhealthy 50 pounds that pals and medical experts fear can be deadlier than kryptonite!

The former Man of Steel in TV’s Lois & Clark series was a six-foot, 190-pound stud when he snared interceptions as a safety on Princeton University’s football team and swiped the virginity of then-galpal, Blue Lagoon beauty Brooke Shields.

But the 53-year-old actor has turned into a man of lard and is gobbling supersize portions of pizza and fast food to find comfort because of his nose-diving career, says a source close to the actor.