There is some very early, speculative research suggesting copper peptides might influence pigmentation by supporting the melanocytes in the hair follicle
doi: 10.1055/s-0029-1220724 52 DuntasLH
To determine reference ranges, labs test the blood of a large representative population sample (chosen based on characteristics like age, sex, and general health status) and use statistical analysis to identify the middle 95 percent of values for the nutrient in question
Kiyono K et al
There is currently no effective targeted therapy to treat MPNSTs and surgical removal remains the mainstay treatment
Concerning symptoms accompanying hunger : Seek prompt medical attention if persistent hunger occurs alongside symptoms such as excessive thirst, frequent urination, unexplained weight loss despite increased appetite, or signs of hypoglycemia (shakiness, sweating, confusion)