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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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    Megadose B12 or folate and cancer link?

    I think, although I'm not positive about this, but I I've read that the problem is more related to Methylcobalamin then Cyanocobalamin. I think that MB12 is what is metabolized from Cyanocobalamin. I suffered a life changing brain injury 24 years ago, and high doses of M12 (about two 5000 mcg...