“I eat three to four times as much as a growing boy would eat,” says Dustin. At 6 feet tall, the 33-year-old restaurant cook says he weighs right around 120 lbs. and has been caught in a cycle of binging and purging since he was 17. Dustin’s mother, Melissa, says he’s now at the beginning of kidney failure, and she fears he may die. Dustin insists he’s sick of being bulimic, but “To be honest, I’ve been doing it so long, I don’t know what to do.” “It’s serious enough to do something about,” says Dustin’s brother, Josh, in the video above. “You’ve got to want the help first." And later, when Dr. Phil refers Dustin to Doctor on Demand for help, does Dustin say he’s ready to make a change? Find out on Thursday’s episode, "Battles of a Bulimic Cook." Check your local listing for air times. Doctor on Demand is owned in part by Phillip C. McGraw and his son, Jay McGraw. WATCH: Man Says Living With Bulimia ‘Feels Like A Prison Sentence’ TELL DR. PHIL YOUR STORY: Hopelessly in need of Dr. Phil's Help?