You're free to believe as you will.
You said that potassium blocks copper. Where did you get that belief from?
This to me indicates there's something not going well anymore in the copper/iron metabolism since cutting out vitamin A.
All of what you write indicates you have massive problems and are very sensitive to all kinds of stuff. Hardly a good way to judge copper requirements.
To me it indicates you have a problem with your intestine and gut flora. Likely from chronic toxicity. Copper is an antibiotic.
If you believe you have copper deficiency, did you at least measure blood copper, ceruloplasmin, hair copper?
Many people, like you are doing here, make way too many assumptions based on unfounded theories and ideas, without any objective data to support it. I also did that in the past.
I measured my copper values and hair copper, and both my blood values (percentage of unbound copper) and hair values indicated chronic copper overload. No need to guess.
I don't limit my copper (I still eat wheat, mushrooms, potatoes), but I probably get 20-30mg of zinc per day from beef.
Just like you, I took copper regularly and it helped greatly with controlling some gut issues. Well, it backfired greatly, led to a hair level of copper beyond the reference range, and I regret it. Taking copper is very dangerous.
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