United States Embassy Pristina Security Message for U.S. Citizens: Heightened Caution During Religio. Senator John McCainâs Remarks to the Assembly of Kosovo. Thank you, Mister Speaker, Mister Prime Minister, and dear friends for that kind reception and for the honor of addressing this Assembly.
If you drink black coffee, with no additives, you can still have fasting labs done. However, coffee will increase your blood pressure and affect some tests .... especially a CRP. Your paying for these tests. I would recommend no coffee 10-12 hours prior if your not sure. The best method is to call the laboratory.
A few months ago, I did a 20-day no coffee test. Since I really like coffee, I hate to admit that my fasting glucose was noticeably lower during those 20 days (about 20 pts. lower) and I had several post prandial numbers that were in the 80's & 90's. I resumed drinking coffee after doing another experiment.