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.
Though several tests might be accurate when drinking coffee before the test, the fasting blood sugar test will not be. FBS or fasting blood sugar, measures the amount of glucose in the blood. This is actually used when you are being examined for diabetes or other ailments. The reason behind drinking coffee before the test is that coffee can be absorbed by the body very fast, especially when caffeine is present. Caffeine can boost blood sugar levels and it can give an inaccurate result on the FBS test. In addition, coffee beans are actually made of 40% sugar.