Adam is suffering from Binge eating disorder.
Explanation:
Binge eating disorder is not one that cannot be treated easily and it does not have to effect the social life of the person that has it.
The disorder is characterized by an controllable urge for the person to keep eating and feeling constantly hungry. This leads to awkwardness in social visitations and people judging them unfairly.
This can easily be curbed with proper medical care and training the body to behave in a certain way that must be encouraged by the psychologist treating the person in question.