My serum b12 level were high at the last count (750) but I have many b12 deficiency symptoms. I've been taking hydroxycobalamin, adenosylcobalamin and methylcobalamin at a combined dose of around 10 mg. The initial side effects subsided and the symptoms lessened, but I plateaued. I'm increasing my dose to around 16 and the side effects are coming back (feeling unwell, very blurry vision - some of them have gone or become less). How high do you think I should keep increasing the dose?
Thank you for your help,