I've read and heard this about the carbs prior to the test. Some people suggest "carb loading" in the days before the test. I personally wouldn't do this as I know I am sensitive to carbs (and I was dxed with GD in my second pregnancy. I am now in my third and declined GTTs and went straight to monitoring and have had very good blood sugar levels following a restricted carb diet). But if you don't think carbs are an issue for you, that might help avoid a false positive.
Quote:
Originally Posted by
cameragirl 
I've read that if you eat a low-carb, high protein diet already, you could get a false positive by not having enough glycogen in your system. If you follow the Brewer diet or something similar, you can avoid issues by upping your carb intake for a few days before the test.
Another tip is to eat a high protein, low sugar meal before the test. The labs often say that fasting is required, but that isn't true. I HAD to eat before both GTT's with DD because I had hyperemesis. Eating a protein meal not only prevents vomiting that will force you to retake the test, it also helps you process the glucose more normally.
Something that lowers most people's blood sugar very effectively is a brief, brisk walk. If they let you leave the lab, take a 15-20 minute brisk walk around the neighborhood. Or, walk right before you go it, it might help.
I was never supposed to fast before the 1hrs that I took, but definitely don't eat a bunch of carbs right before. Give yourself 2-3 hours after a carb-heavy meal before you drink that glucola. Like protein, fat will also slow glucose absorption. So if you do eat, I would suggest something primarily fat and protein.
And get plenty of sleep! Being tired can throw your results. As can being sick (so if you are getting sick, postpone the test).
FWIW I don't think you can really "trick" the test into a negative if you are actually insulin resistant or have GD.
Follow Mothering