ghk-cu copper overload risk wilson's disease Wilson Prion protein promotes copper toxicity

Vague answers are the answer

Moreover, concerns regarding their sterilization and their theoretical involvement in carcinogenesis also exist [23, 188, 245247]

Vitamin B12 injections are most clinically appropriate in cases of confirmed vitamin B12 deficiency, malabsorption syndromes including pernicious anaemia or post-gastric surgery, significant symptoms where rapid restoration of vitamin B12 levels is required, or failure of oral supplementation due to poor absorption

Vitamin D receptors are found in many tissues, including immune cells and the brain, signifying its expansive influence

doi: 10.22038/IJBMS.2017.8575 108 McMahanKWegmannFAidMSciaccaMLiuJHachmannNPet al

It's a built-in quality check that's both beautiful and reassuring