I'm needing some input on OAT tests -- My ND is wanting me to get one. He has dealt with Genova Diagnostics, but is willing to get an account with Great Plains if that is the test I want. The Great Plains OAT (Nutritional & Metabolic Profile) has 76 analytes on it. The Genova OAT has 40-some. That seems like a big difference. I suspect I have particular problems, such as a block in homocysteine-to-methionine conversion, and multiple Krebs cycle blockages. I'm sure I have high ammonia (long-term), especially when eating meat. Also high glutamate levels. I've developed histamine reactions, and from my particular chemical intolerances, I suspect high acetaldehyde. There is also something going on with the Bs: I'm needing lots of potassium, even when I don't take MeB12/AdB12. And lots of thiamine, since potassium depletes it. I'm barely tolerating 10-15 mg of B2 (R-5-P). And having trouble balancing niacin and the B12s/mefolate. The analyte lists are Greek to me. Can you fine OAT-educated people steer me a bit?