@Learner1 ;
Don't you ask the most challenging questions !
Regarding MRI to detect brain iron , I haven't seen that QSM is experimental, it's been around sometime, and is considered to be a more accurate method of imaging.
I don't understand these imaging techniques, it's what I've come across when reading about brain iron overload.
Since the brain has high amounts of metals naturally, it's difficult to discern what's excessive.
This article suggests that gadolinium is used because it doesn't have metals.
https://link.springer.com/article/10.1007/s11604-016-0532-8
"However, compared with gadolinium, the pattern of iron enhancement is heterogeneous and variable, so iron-based contrast agents cannot be used instead of gadolinium-based contrast agents (GBCAs) [
80,
81] "
I had an MRI , more than 10 years ago to detect masses or lesions in pituitary, nothing of that nature was detected, so the endo pronounced me "stone cold normal". umhumm ( I didn't pursue a neurologist because I had no faith .)
I don't have the wherewithal to get a more sensitive brain MRI, so I've just assumed that there's some excess iron clanking around in there because of my neurological symptoms. (better now, not gone)
I was forced to try to find a way to deal with the pain and unsteady gait that was so debilitating. Body parts going numb, falling, losing cognition....doctors were failing. Thank goodness for researchers and their brilliant papers !
With copper, there is so much bias against it, even in the science world, that I just choose the pro copper papers. I mean yes copper can be toxic just like every other metal, and every vitamin. Yes copper can be angiogenic, just like every metal or vitamin, even our B's.
Copper needs to be managed, but it's still difficult to understand what it's doing. One interesting fact about it is that when a UTI is occurring, copper is mobilized to the urinary tract to fight it. Copper is an excellent antimicrobial, but not infallible. E.coli has its ways...
Some people believe that if copper is normal to high in serum , but ceruloplasmin is low, then that indicates unbound copper. Copper is also bound to albumin, etc., so I doubt that low or normal ceruloplasmin indicates unbound copper. So much is still unknown.
https://www.j-alz.com/content/alzheimers-disease-and-copper-biochemistry
Zinc can be low because there are microbes that utilize it for growth. The body may be sequestering it for that reason. Also, iron can compete with zinc for absorption in the intestines. Iron usually wins because we mammals haven't evolved to manage this extreme exposure to it from food fortification, air pollution, so on.