My GBF was living with me at the time and just couldn't believe how much I scratched. It was insane, very very unpleasant and embarrassing! I was convinced for a while I had scabies, but I didn't.
You wouldn't put sub-standard fuel in your car, would you? Patrick Holford's New Optimum Nutrition Bible is a fantastic source of information on how to heal your body from the inside out.