Prepping for Testing advice?

[xxnonamexx]

My dr. stated to eat gluten for 4 weeks before bloodtest. I feel so much better w/o gluten and was going to wait until after the summer vacation but hesitating since reading the antibodies might go away etc. and if I can get it over with before hand especially before daughters graduation next month and before summer might be nice. Any tips besides eating at least 4 slices of whole wheat to get 10g of gluten in for testing. Im more worried about when it hits to find a bathroom especially b/c it can be after eating a meal or might not hit until after 2 days etc. Should I just go back to eating normal to prepare or does it make sense eat 2 slices whole wheat 2x a day and the rest gluten free to prep for test? I noticed b4 gluten free diet I started 5 weeks ago I would have non gluten-free oatmeal and have to go to bathroom right after eating or 2 hrs later. In afternoon I would eat whole wheat and not need to go immediately to bathroom after eating. What steps did you take for test prep.

[xxnonamexx]

I also read this which some recommended as well: NASPGHAN recommends eating roughly 2 servings of gluten, equivalent to 2 slices of wheat-based bread, daily for 6-8 weeks prior to testing.

[Scott Adams]

Here is more info about how to do a gluten challenge for a celiac disease blood panel, or for an endoscopy:

Quote

"...in order to properly diagnose celiac disease based on serology and duodenal histology, doctors need patients to be on gluten-containing diets, even if they are causing symptoms, and this is called a "gluten challenge."

• Eat gluten prior to celiac disease blood tests: The amount and length of time can vary, but is somewhere between 2 slices of wheat bread daily for 6-8 weeks and 1/2 slice of wheat bread or 1 wheat cracker for 12 weeks 12 weeks;
• Eat gluten prior to the endoscopic biopsy procedure: 2 slices of wheat bread daily for at least 2 weeks;

and this recent study recommends 4-6 slices of wheat bread per day: