what is the difference between histamine in feces and histamine in urine?

Question from Moniek: What is the difference between histamine in feces and histamine in urine?

A: The histamine in feces reflects the histamine load from the gastrointestinal tract.
Methylhistamine in the urine, on the other hand, gives a picture of the conversion of histamine elsewhere in the body.
If it is not clear from the symptoms where to look, it is best to do both tests so that the picture is clear.
In addition, a whatmagiketen test is also advisable.

https://www.bloodtesting.nl/histamine-intolerantie-uit-ontlasting-rp.html

https://www.bloodtesting.nl/methylhistamine-uit-urine.html

https://www.bloodtesting.nl/pre-screening-wat-mag-ik-eten.html