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GHK-Cu rarely causes redness at concentrations between 0.5 and 2 percent
If you have reconstituted with sterile water by mistake and cannot use the entire vial within 24 hours, the safest approach is to discard it and start fresh with bacteriostatic water
Most users avoid shaking because shaking harms some peptides
Confirms no viable microorganisms are present - going beyond sterile filtration alone
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