Pharmaceuticals, environmental pollutants, food preservatives and artificial additives, household chemicals, UV radiation, and electromagnetic fields are just some of the components of modern living that affect our Glutathione levels
Unprocessed western blots
The Hostynek and Maibach group at UCSF measured exactly this in 2011: human skin permeation of GHK-Cu as a function of skin layer, with the result that the peptide accumulates in the upper stratum corneum but does not pass through to viable epidermis or dermis in any meaningful quantity 4
Research has shown that inadequate vitamin B12 levels may increase the risk of depression and poor cognitive function, requiring supplementation to restore healthy levels
This, in turn, has increased the proportion of M1-TAMs and effective inhibition of cancer cell proliferation
This B12-intrinsic factor complex then travels to the terminal ileum, where absorption occurs