User can starve targets

Pros:
-user can make targets not hungry
-user can control pain caused
-user can make targets throw up food
-user can make it impossible to swallow

Cons:
-user may take it too far
-user can not eradicate pain
-user may make this permanent in targets
-user has this reflex and needs only liquid

Weakness: food smells
User will have urge to use quirk on someone