I did one a couple of weeks ago, marialyce - but not because my GP asked me to, I just wanted to see if anything flagged up plus I've got to try to do something. I eat very little anyway (and even less now) so I don't really know what to look for, other than the obvious ones, like dairy and wheat... If my GP was more interested in my symptoms and explained how to do a food diary and what to look for, then I would be happy to keep one, but I've still got a 3 week wait for my next appointment!