I've been following a paleo diet for well over a year now. I also had an advanced food allergy test back in the summer (the MRT/Leap test through Oxford Biomedical). There were a few highly reactive foods that showed up on the test. These I avoid. But there were also some moderately reactive foods that I have not yet eliminated. I do not eat dairy or gluten but I still eat nightshades (peppers, tomatoes, etc.) from time to time. I try to limit my Sugar intake.
The health professionals I'm working with are not naturopaths (thankfully). They are affiliated with functional medicine, which is a more science-based approach, involving lab tests, for uncovering and treating hidden internal stressors (e.g., fungal overgrowths, hormone imbalances, etc.).
I have not heard of Oxypowder but will look into it.