Ryan Seacrest certainly does not want to go back to his old chubby days, when he used to munch on cookies and nachos behind his mom's back. Then, how does the American Idol host maintain his slimmed-down fit figure?

He previously has spoken about his dietary practice with Men's Fitness: "I love vegetable juices. Sometimes, I'll make juices -- with or without pulp, it just depends."

Apparently, he is quite "obsessed" with green juices. It has been revealed that Seacrest's "bizarre dieting is going a little too far," as he has an assistant on hand with a selection of chilled nutrient-packed juice at all times. Moreover, a source claims that the media mogul "now demands that one of his four assistants trail him during all working hours with a high tech insulated briefcase filled with the macrobiotic green drink that he swears by to keep his skinny figure."

"Ryan has also completely given up drinking alcohol for dietary reasons," the source continued. "He was never a heavy drinker previously, but now, he doesn't imbibe at all so that he can save the calories."

Ryan Seacrest has admitted he grew up an overweight child in Dunwood, Georgia, who kept his shirt on at the community pool. "I do remember that feeling of growing up and being a little bit overweight," he said. "I also remember at times being teased about it and because of that it's still in my brain. I never want to feel that way again."

"As far as Ryan's diet goes, he's either paranoid in the extreme about his health, or playing a game of one-upmanship with his health nut career rival Carson!" the source added.