Long-time lurker, finally signed up to ask something, as I couldn't find any similar questions!
I visited the doctor for a general health check-up, and after the subject of diet and eating habits arose, I told her that I feel bloated, get stomachaches, and am lethargic after eating anything with gluten. This is a self-diagnosis; I suspect I have an intolerance/sensitivity issue at most, nowhere near coeliac, thankfully. However, she ordered me a blood test, and asked me to start eating gluten at least a week before the test - I quote "a couple of slices of bread a day", so that it shows up in the test. Now, she mentioned that intolerance is unlikely to show up on the test, so I'm not sure whether I should go ahead with it. Cost isn't an issue (I'm in the UK, using the NHS), but it seems a waste of time and resources on both sides if the test won't show anything. My family is pressurising me to take it, as they do not follow a paleo lifestyle and tend to get very annoyed when I opt out of the grains and bread at mealtimes. But that's a story for another time.
Another factor to consider is that I am trying to get into ketosis (for weightloss), and anything with gluten also tends to be high-carb, so that would throw me off a little. I am already doing 16 hr IF 3+ times a week, intense calesthenics for 15 mins x 5 per week. (Any tips here would be welcome, too!)
However, should I go ahead with the blood test, what is the minimal amount of gluten I can get away with eating, and for how long?