Purity is unverifiable at the consumer level: As a grey-market research chemical, material sold as Dihexa is not subject to pharmaceutical quality control identity, purity, and solvent residue are not guaranteed
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
This is why pernicious anemia is considered an autoimmune disease
Image Credit: Newcells Biotech Model for this service aProximate TM proximal tubule cells aProximate TM is a highly advanced in vitro model of kidney PTCs that mimics physiological conditions
DSIP and Recovery Many patients interested in peptide therapy are also interested in recovery: recovery from stress, exercise, burnout, chronic inflammation, or poor sleep