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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. H

    High B12 + high igA levels CFS?

    I realize this is an old thread. Just by chance, did you ever determine the cause of your elevated B12 and all the relevant symptoms? Experiencing an almost identical situation. Thank you