Call for help: Christina, 23, from South Haven, Mississippi, who appears in one episode of 'My 600-lb Life', weighs 670lbs and is unable to leave home without assistance.
On the right track: Christina, seen with her husband Zach, meets with doctors in the new TLC show to try and find a solution to her crippling weight
Battling the bulge: Others to feature on the eight-part documentary series include 43-year-old mother-of-one Zsalynn from San Antonio, Texas, who weight close to 600lbs
Destructive cycle: She says her life has become a daily routine of immobility, watching seven to eight hours of TV a day and gorging on
Breaking point: Penny, 46, from Atlanta, Georgia, is desperate to battle the bulge in a bid to be a part of her child's future - here her husband Edgar helps mover her leg in bed