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. 他有一个 体重指数(BMI) 47个,证明他有病态 肥胖. The extra weight took a dramatic toll on his health. 格拉布斯患有第二型糖尿病 糖尿病高血压; 甲状腺问题 and back pain, requiring him to take up to 15 pills a day.