Dr. Travis Stork Of 'The Doctors' Talks About Celebrities Yo-Yo Dieting For Certain Roles

Los Angeles, CA (CBS Sacrament0) - Entertainment Tonight talked to "The Doctors" Dr. Travis Stork about the risks celebrities take when yo-yo dieting for certain roles they take on.

"When you're putting on all that quote unquote 'fat weight' around your gut, that's biochemically active and it puts you at risk for a lot of things. The biggest is increased heart rate and increased blood pressure," said Dr. Stork.

While weight gain or loss may come with rewards such as an Oscar, like Charlize Theron's role in "Monster" after gaining 30 pounds, it could also cost health issues. Matthew McConaughey lost weight for "Dallas Buyers Club" and dropped to  a slim 135 pounds.

"I think the weight gain is kind of the more dangerous territory -- more dangerous than the weight loss," McConaughey said.

In 2004 Christian Bale dropped nearly 60 pounds for his role in "The Machinist."

"I don't think it's something I would wish to do again. It ain't great for your health," Bale said.

Dr. Storks believes, "In general with that rapid weight loss, you can get malnutrition -- certainly if you're not getting enough protein -- and even put you at risk for gallstones, which certainly anyone who's had them knows that's no fun."