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GHK-Cu is a naturally occurring tri-peptide made of three amino acids glycine + histidine + lysine , bound to a single copper ion
The X39 patch is easy to use
In the Diabetes Prevention Program Outcomes Study (DPPOS, N=1,800), metformin use for a mean of 12.7 years was associated with a 13% prevalence of B12 deficiency versus 5.4% in the placebo group (P 9%) impairs wound healing regardless of peptide use [4]
Association between the 15-kDa selenoprotein and UDP-glucose:glycoprotein glucosyltransferase in the endoplasmic reticulum of mammalian cells
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