I was told the fasting tests would be better with 12 hours between the last meal and the test. I can drink water and take a snack with me so I'm not too weak afterwards.
In fact, that's what I'm doing right now, waiting for another quarter hour or so till I can leave for a blood test, the first one since 2005. Finally getting around to having things checked, since I pay every month a bundle to Blue Shield, thought I might get some use from it.