I sent a piece of my hair away for testing and it came back with a whole list of foods that I am allergic to. My GP doesn’t believe the result and say

There is a great problem with the sort of testing you have had done.
Often, there is very little science behind the test and the results,
and we feel that the people doing the tests have a financial interest
in the test being positive. Immunologists work much more with
properly researched and what we call ‘evidence-based’ tests so can
give more accurate results. If you tried to avoid the ‘whole list of