I went through 3 PCP’s and 2 gastroenterologists before finally finding a good team. I was recently venting my frustrations to my current PCP when she explained the reason I’d had so much trouble with other Dr’s is that few of them have nutrition education of any kind. The older they are, the less likely they know anything about it. Nutrition is not tested in their board exams and is not required to maintain their medical licensure or accreditation. She explained the only docs who know about diet/nutrition are those who self-educated themselves to help patients and that often a given patient will be better informed about their dietary needs than the average Dr. Medical care in the USA was largely defined by the Rockefeller family in the early 1900s with a focus on surgery and drugs for treating illness, meanwhile diet was ignored, treatment remains similar to this day.

I looked it up myself and holy shit it’s true! Here are some links and associated blurbs:

https://thecounter.org/medical-schools-lack-nutritional-education/

“In a new report published by the Harvard Food Law and Policy Clinic, researchers write that, on average, students in medical schools across the country spend less than 1 percent of lecture time learning about diet, falling short of the National Research Council’s recommendation for baseline nutrition curriculum. Neither the federal government, which provides a significant chunk of funding to medical schools, nor accreditation groups—which validate them—enforce any minimum level of diet instruction.

And it shows: While you and I might show up for our annual physicals expecting feedback on our what and how much we should be eating, just 14 percent of doctors feel qualified to offer that nutrition advice.”

https://www.google.com/amp/s/www.washingtonpost.com/national/health-science/your-doctor-may-not-be-the-best-source-of-nutrition-advice/2018/07/06/f8b3ecfe-78af-11e8-93cc-6d3beccdd7a3_story.html?outputType=amp

“In a 2015 survey of 121 four-year medical schools, Kohlmeier and colleagues found that 71 percent did not require at least 25 hours of nutrition education and that fewer than 20 percent required a nutrition course — fewer even than 15 years before.

‘The biggest thing that drives a lot of medical schools to put particular things in their curriculum is what gets tested on the boards. And unfortunately, as of right now, doctors are not tested on what foods a patient should eat,” said Tracy Rydel, a clinical associate professor of medicine at the Stanford School of Medicine.’”

https://www.google.com/amp/s/worldaffairs.blog/2015/10/20/how-rockefeller-founded-modern-medicine-and-killed-natural-cures/amp/

(No blurb for this one , just a good blog post that explains the corrupt origins of US medical treatment and education and how one man spent his life trying to remove nutrition from medicine altogether.)

I personally have a severe case of IBS-A/M and after years of testing and medicines, the only relief I get from symptoms comes from diet and mood regulation. You have to be your own advocate if you have a diet related illness.