Good question @Madison85. Our insurance offers discounts for metabolic screening and getting an annual physical. I put these off to close to the deadline. Both were less than a week of each other and several tests were duplicated. I found it interesting that my blood glucose at the metabolic testing was a good bit lower than at the physical, which I attributed to a cardio workout the morning before the test. But maybe it could be the longer fast? I read somewhere that up to 15 hours was okay.