Hi. If you're not familiar with my story, I have had B12 deficiency symptoms for 2 years now, as well as a recently diagnosed B6 toxicity (taking anywhere between 50 - 120mg B6 EVERY DAY for about 3 years.) You can find more of my story and the blood test results from 2014 in this thread - http://forums.phoenixrising.me/index.php?threads/boos-healing-with-b12-journal.32813/ I am thinking of getting these tested: B6 B12 iron/folate/ferritin (I've been very low in iron, iron saturation and ferritin and am supplementing) Vitamin D General Chemistry including potassium (but even then it can vary from hour to hour) Glucose Cholesterol Estrogen Anything else you think I should have? I'm in Australia and my GP is fairly accommodating when it comes to requests for blood tests, but having said that I've only asked for the most basic of tests so far. So I don't have to pay for any tests. The only roadblock that I might come against is if she doesn't think it's necessary for me to have a certain test. But I can try anyway.