• Welcome to Phoenix Rising!

    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 (FM), long COVID, postural orthostatic tachycardia syndrome (POTS), mast cell activation syndrome (MCAS), and allied diseases.

    To register, simply click the Register button at the top right.

Elevated serotonin?

Anyone else have this? Level was 327 (56-244). If it is not caused from a carcinoid tumor, what could it mean here? ((I had a few fancy scans looking for neuroendocrine tumors a year ago due to my elevated VIP (vasoactive intestinal peptide) levels. Nothing was found))

I had wondered about possible kynurenine issues here a year or more ago, so could it be indicative of an issue after all?