Hi all- I have a blood test scheduled for 9:30am Saturday morning and was wondering what an optimal amount of time to fast before the draw would be. I've heard 8 hours recommended for glucose testing and 12+ for lipid testing. I imagine that fasting for too long might cause my blood sugar to eventually rise above its baseline level and that there would also be a hormonal reaction to a long fast.
For what it's worth, I'm having the following tests done: comprehensive metabolic w/ eGFR (minerals and kidney/liver markers, I believe), lipids, CBC, C-reactive protein, TSH, free T4, free T3, free/total testosterone, D,25-OH.
Additionally, are there are any important considerations regarding what I eat for my last meal before the fast? Thanks in advance for any help!