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Repeated freeze-thaw cycles cause ice crystal formation that shears peptide bonds and precipitates the copper complex

Selected Research References Seiwerth S, Sikiric P, Rucman R, et al

3-Ingredient Serum with Dual Copper Peptides: This straightforward formula pairs GHK-Cu with AHK-Cu at 8% concentration, 4,800mg per bottle, in a distilled-water base

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Briefly, an aliquot of (20 l) of the homogenate was mixed with a substrate, which contained PBS (EDTA), L-methionine, NBT.2HCl,Triton-X, and riboflavin