[Lanfear]

In my opinion 1 week of suddently super healthy will not help with much. it's like girls going on a crash diet: you set yourself up for failure.
If you don't like processed food start with something manageable like switching a meal for a salad, less soda, always choosing a vegetable as a side dish (French fries dont count).

Get used to it and over time I think you can train yourself to prefer healthier food.
I just came back from KATGweek and oh my did I eat unhealthy but that's ok because everybody should be allowed to eat 4am greasy pizza after a party and burgers with fries on vacation.