50 Cent's Radical Diet: This Week on AOL Health

We've all heard about celebrity crash diets, from vinegar detox to never dining out, and we've seen many actors lose weight for an upcoming role. But, not many have seemed as extreme as rapper 50 Cent's radical transformation for a new movie in which he plays an athlete battling cancer.

50, whose real name is Curtis Jackson III, went on a strict liquid diet for nine weeks -- leaving him 54 pounds lighter than his original 214-pound build. The actor looked very thin in pictures he posted on his Web site, so AOL Health spoke to several nutrition experts to get the scoop on the healthfulness of actor's rapid weight loss routines.

"How bad [rapid weight gain and loss] is depends on how much and how fast," Marion Nestle, New York University food studies professor, told AOL Health. "It can be lethal either way."

For more details on 50 Cent's diet and what experts have to say about it, check out AOL Health.

Find out which actress said that she could go a week without eating.