Franz diffusion cell studies comparing free GHK-Cu versus liposomal preparations document 5-fold greater dermal concentrations and 3-fold higher retention times for liposomal formulations
Among the peptides in this article, it has some of the more credible evidence, particularly for skin health
Patients pay UCP
What isn't established is that this translates into the dramatic, precisely-quantified superiority commonly claimed, and what's often left out entirely is that topical GHK-Cu, including our own 1% GHK-Cu Face and Skin Serum, has more, not less, human clinical evidence behind it, plus a regulated supply chain with verifiable manufacturing standards
Unfortunately, none of these strategies have been successful
Glutamine alone also reduced length of hospital stay in patients with colorectal cancer (53)