Heverly-Coulson, R.J
Astrocytes make up the majority of cells in the human central nervous system (CNS) and are absolutely essential for healthy brain function as they support metabolic, functional, structural, homeostatic, and neuroprotective functions [34,35]
However, a recent systematic review of five observational studies concluded that the association between 25-hydroxyvitamin D concentrations and cognitive performance is not yet clear (56)
[3] [8] Patients receiving B12 injections should inform their healthcare provider of all medications, as certain drugs (including metformin, proton pump inhibitors, and chloramphenicol) can affect B12 absorption or metabolism
It's generally recommended to avoid layering GHK-Cu with highly acidic ingredients like L-ascorbic acid (Vitamin C) or potent retinoids in the same session, as this can reduce efficacy or increase irritation