Mrs. D, thank you for posting that link. If he wants to do a biopsy, I'll definately say no. I get fasting insulin tests every three months and my PCP has been doing an A1C to ever since my glucose started to rise from all the MBB's that were being done, back to back for predictive neurolysis results, and that is well out of the range in the low 5's. So if he does decide to do the GTT, at least its one test that hasn't been done so far. I'm still pushing for genetic blood testing as I feel this is going to be a hereditary form, based on my fathers complaints. I wish I knew what it takes to be able to get these done and what sort of hoops the insurance company makes the docs go through to justify that. If anyone has any insight, I'm all ears/eyes.