You can use your keyboard to see the next slide ( ← previous, → next) Renee Zellweger
wowed fans by gaining weight to play Bridget Jones and then quickly losing it not once but twice. And it's not just the ladies that repeatedly lose weight for plum movie roles. Rapper 50 Cent
and actor Christian Bale
have done similar stunts. Experts agree
that yo-yo dieting is both psychologically and physiologically damaging. Effects include an elevated risk of heart attack, gallstones, stroke, diabetes, depression and, sadly, weight gain.
Experts weigh in on controversial celebrity weight-loss techniques.
15 Celebs Who Lost Weight for the Wrong Reasons