Photo SpecialThey lost half their size!

MARY SMITH

Age: 40
Starting Weight: 253 lbs.
How She Did It: The Atkins Diet
Why She Did It: A visit to her doctor scared her into losing weight after she learned she was pre-diabetic and heading for heart disease. ("My doctor said,) 'You're going to have to do something, or you're going to die,'" she says. "I wanted to see my kids grow up."