Dr. Oz's advice hasn't just saved lives…it's also changed many viewers' quality of life. Thanks to his diet and fitness tips , overweight men and women have been able to transform their bodies and takes charge of their health.

Jillian , a past guest, went from drinking 300 ounces of diet soda a day to jogging 20 miles a week. With Dr. Oz's help, she's also lost 50 pounds.

Weight loss all-star Jason has dropped 70 pounds by walking 30 minutes a day and adding whole grains to his diet. As a result, he cured himself of hypertension, sleep apnea and all signs of diabetes.

Back in 2007, Dr. Oz called Frank a "ticking time bomb." Now, this professional bowler is 103 pounds lighter. He says he's keeping it off by avoiding fried foods and working out daily.