However, if my hair mineral analysis comes back deficient in copper then ill probably consider supplementingHave you poked around the Copper Revolution Facebook group?
Some folks there have been taking 30+mg for years and claim nothing but improvements.
My personal experience is more like what you're describing though. A month or two of solid improvement followed by some resurgence of symptoms.
It seems in my case that ANY fructose (including what's in sucrose) causes my symptoms to worsen. Starch seems to be fine though.