What is the difference between the DAO and histamine test?

Question from Nancy: what is the difference between the DAO and the histamine test?
Which one should I do?

A: The DAO test measures whether you are allergic to histamine because you produce antibodies to it.
https://bloodtesting.nl/dao-diamino-oxidase-histamine-intolerantie/

Histamine test from stool measures if you have too much histamine
https://bloodtesting.nl/histamine-intolerantie-uit-ont.../

If you don't know what's causing your symptoms, it's best to do both or start with one.

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