[16] [17] [18] It was also established that GHK-Cu stimulates both the synthesis of metalloproteinases, the enzymes which break down dermal proteins, and their inhibitors (anti-proteases)
RT-PCR was used to measure the gene expression (mRNA) of MMP1 (a metalloproteinase), MMP2, TIMP1, and TIMP2 (tissue inhibitors of metalloproteinases) in treated HDFa cells
Kirkland walks through the part most consumers never see: why a peptide that looks flawless on a standard lab test can still be carrying a manufacturing residue that does real harm, and the additional purification step that addresses it
Individual results vary based on starting weight, dose tolerated, and consistency
Preclinical models show activity over 48 weeks
However, certain drugs may affect how your body uses B12, making injections particularly beneficial