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    Created in 2008, Phoenix Rising is the largest and oldest forum dedicated to furthering the understanding of, and finding treatments for, complex chronic illnesses such as chronic fatigue syndrome (ME/CFS), fibromyalgia, long COVID, postural orthostatic tachycardia syndrome (POTS), mast cell activation syndrome (MCAS), and allied diseases.

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  1. D

    Could I have a B12 deficiency or something similar?

    Thanks for your replies, very useful information. I am going to see my GP tomorrow and am going to ask them to test my blood again for serum B12 levels as well as folate and possibly other vitamins - e.g. D. I will also mention the Methylmalonic acid and homocysteine tests as well. I will...
  2. D

    Could I have a B12 deficiency or something similar?

    Hi all, I am new here and am posting because I just haven't been feeling myself for the last couple of years. I am male, 37 years of age in the UK. I don't smoke and drink moderately. I had my B12 levels tested back in October 2011 and it was 405, which was within the normal range (quoted...