I haven't looked into histamine issues. Any good resources you can link me to? Or, if I could bother, maybe you could answer a few starter questions?
What causes high histamines?
What are symptoms of high histamines?
How do you treat high histamines?
Also, as the test you suggested is a blood draw, how do I get that done? Would I get it done at a local lab that mails the sample to the company you suggest?