A New Life Post-Gastric Bypass Surgery

Part 2: Although he feels better, teen says eating too fast makes him sick.

04:40 | 09/07/2011

ABC News Live

"Primetime Nightline" explores the psychology behind food addiction.

400-Pound Teen Opts for Gastric Bypass

Part 1: Nick Preto, 16, decides to take the risk of going under the knife.

A New Life Post-Gastric Bypass Surgery

Part 2: Although he feels better, teen says eating too fast makes him sick.

Bulimic, Overeater Seek 'Hope' Treatment

Part 3: "Shades of Hope" treatment center addresses several food addictions.

Will Ashley Be Kicked Out of 'Hope'?

Part 4: Bulimic woman could be kicked out of treatment for not finishing a meal.

Inside a Food Addict's Brain

Part 5: MRI brain scans show addictive reactions when a patient is given sugar.

1 of 1