Blood test

I was just wondering that if you are having a blood test to test for coeliac disease will you 100% not get a positive result if you haven't consumed gluten fully for over a month or is there still a chance that anti bodies can be found if I've had some, I have my prom in a month and don't want to be eating gluten just incase it is the cause of my abdominal bloating???

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Kerinroberts,

The UK Coeliac Society advise that normal amounts of gluten should be eaten for up to six weeks prior to testing otherwise you may get a false negative. Why don't you wait until after your prom to do the gluten challenge if you are concerned about bloating?

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If I still do the test, will it 100% be negative if I haven't consumed gluten every single day for 6 weeks?