Jeff Grubbs, of Galt, California, describes his old self as a "ticking time bomb." At his heaviest, the 48-year-old, who is 5 feet, 7 1/2 inches tall, weighed 311 pounds. He had a body mass index (BMI) of 47, qualifying him as morbidly obese. The extra weight took a dramatic toll on his health. Grubbs suffered from Type 2 diabetes, high blood pressure, thyroid problems and back pain, requiring him to take up to 15 pills a day.