PHOENIX -- Colleen Williams weighed 180 pounds at age 10 and gained an average of 40 pounds a year during her teen years. By age 16 she weighed 420 pounds.
In her 20s Colleen gained nearly 300 pounds from a daily intake of 6,000 to 10,000 calories, largely from fast food. At age 31, she weighs just over 700 pounds.
Colleen lives in Phoenix with her husband Derek. She says she is addicted to food and the feeling of calm it brings, but she has come to realize that her weight is killing her.
Despite her age and condition, Colleen has never had even the most routine medical tests due to an extreme fear of needles.
In January, Colleen decided it was time to make a change. She signed up for the "Move It and Lose It" challenge, a nutrition, exercise and coaching program featured on "The Dr. Oz Show". Dr. Oz was touched by Colleen's story and recently flew to Phoenix to help her get started on a life-saving weight loss journey.
Colleen will make her first appearance on the Dr. Oz show on Wednesday, March 2. (In Phoenix, the Dr. Oz show airs at 8 p.m. on KTVK 3TV).