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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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    Hack my reaction to NAC - advise needed

    Hi, this is my first time writing in this forum. Several months ago I started a NAC supplement (jarrows). After a couple of days I noticed that my back became very stiff. The left lower back became slightly painful, as if with inflammation, and the rest of the back was rigid. I'm 35, but I felt...