Look for a functional medicine doc. They’ll order the test and will be much more likely to help him stay healthy, than to constantly dole out “sickness care.”

Best choice I ever made was when our beloved family doc moved away, instead of finding a new “primary care provider” I got the whole family to begin seeing a chiropractor regularly. She introduced me to an integrated medicine/holistic doc, who we’ve had help us with a couple of kids’ allergy issues. And her husband is a functional med doc; a couple of us have seen him and gotten help actually correcting health issues through diet and lifestyle changes.