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Wolkowitz, O
Several lifestyle factors can accelerate the breakdown of the collagen you already have
Higher isn't always better, especially if you're just starting out or have sensitive skin
For most people the single best copper peptide serum is a stable 12% GHK-Cu formula with a low, non-irritating pH and minimal competing actives concentration alone is not a reliable measure of quality
Loyall et al
, Stable Gastric Pentadecapeptide BPC 157 and Wound Healing, Frontiers Media SA, Jun
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