As you may be aware, we have had a considerable interest in histamine intolerance ever since we started to work, many years ago, with Dr Janice Joneja. She is a world expert on histamine intolerance and for some years ran a Q&A series on histamine intolerance for us on the FoodsMatter website.
In 2017 we combined this with the various other articles that she had written for us on the subject into Beginner’s Guide to Histamine Intolerance (available on Amazon here) and then, the following year, into a Comprehensive Guide to Histamine Intolerance for Healthcare Professionals (available here), following that up a year later with Histamine Intolerance, the Cookbook.
So, as you can imagine, I was intersted when Alex G pointed me to an article in Network Health Digest suggesting that there might be a link between Long COVID and histamine intolerance.
Long COVID symptoms are very similar to those of histamine intolerance (diarrhoea, headache, asthma, rhinitis, hypotension, arrhythmia, hives, itching, flushing etc). So the theory is that these could be triggered by MCAS/Mast Cell Activation Disorder in which mast cells release excess histamine in response to, among other things, a viral infection – such as COVID. Anecdotally, it is reported some Long COVID sufferers who have tried a low histamine diet believe that it may have reduced their symptoms.