Was this an alternative doctor that gave you the urine test? I'm not aware of MD's doing a urine test to determine AI. It sounds like an alt doc gave you that diagnosis and wondering if they are trying to tell you you have so-called adrenal fatigue as AI would mean your cortisol levels are always low throughout the day from there being actual physical damage to your adrenal glands where the theory of "AF" is where your adrenal glands are too stressed out to produce proper levels of hormones, although most people here who thinks or been told they have "AF" have high cortisol levels and I also disagree with the theory of "AF" and think it's something else that's totally correctable. I know mega doses of Vit C are recommended by a lot of alt docs for "AF" and they also utilize the flashlight in the eye test.
I'm asking this because after my own experiences from dealing with my own health battles that one, a lot of people here are most likely misdiagnosed and two, I don't really trust alternative practitioners for diagnoses anymore and would more trust MD's to make diagnoses because they are bound by science. Not saying MD's don't make mistakes or know everything, it's just that alt docs don't have to rely on Science for their diagnoses, hence the term "alternative" medicine.
I'm also in agreement with saywhatagain about relying on getting most of your nutrients for foods than supplements. I think supplements have their place to help you get back on track, but if you have to take them longterm then they are just being a bandaid and it's my opinion a person is not on the correct diet. I'm also in agreement that you shouldn't have to worry about starches or grains if you keep your fat intake relatively low and especially if you eat a lot of fruit and veggies. I eat a mostly plant-based high-carb/low-fat diet now and it quickly healed me of most of my health problems very quickly.