Most people take a test for pyroluria. The Scottish have a high frequency of people with pyroluria which is made worse by drinking alcohol lololol. Causes anger and rage issues.Lol I learned of pyroluria years ago since I believed I had it myself.
The body does not reject zinc, that is utter nonsense. You would be dead so fast if this were the case quickly showing signs of severe zinc deficiency. We do have an epidemic of zinc deficiency in the world, with around 1 billion estimated to be zinc deficient due to utter trash diets low in animal proteins. Old propaganda that made everyone think red meat is bad is also a major part of this. The zinc RDA is low in probably should be around 15mg. But all this is not due to pyroluria. It is due to a chronically nutritionally deficient diet that leads to severe depletion of zinc.