Apologies for not reading every ones contribution, so if this has already been covered once again sorry, After 1st diagnose (un-diagnosed T1 DKA for 30 days straight) I was always tired and as mentioned it was, by the docs n nurses my high BG, now it's "under control" and I checked my B12, Vit D and iron when I last visited the docs all good they say, and I still have days when I check my BG and its perfect 6-7mmol HOWEVER I still feel a lack of energy, I have now started thinking it could be depression creeping back in, some days good some bad, I never though of chronic fatigue before, so i will have a good read of the other comments and read the OP's article, when I have the ENERGY! - I am glad SOPHIA78 mentioned DKA has anyone done a poll of those with T1 how many have experienced severe DKA i think that is a game changer for T1 - imo