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I had a fasting blood test to explain my weeks of extreme fatigue. Came back v low in B12 and glucose levels of 8.8. I need a retest in 2 weeks. I’m v concerned. I don’t feel I have any of the typical symptoms of D apart from tiredness, which could be because of b12/D deficiency. I know my diet needs to improve. I snack rather than eat and have gotten used to eating x1 meal a day. My question is does this all explain my high level? Is this something I can turn around by taking better care of myself. Have to say I’ve spend much of the day looking at what a low GI diet looks like. All rather confusing. Any insights would be most welcome. M