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GHK-Cu acts at the extracellular matrix (ECM) level, modulating the balance between matrix metalloproteinases (MMPs) and their inhibitors (TIMPs) to regulate collagen turnover, and stimulating fibroblasts to produce collagen type I, collagen type III, and elastin
Improve firmness, making wrinkles appear less pronounced
Other conditions may be covered as well depending on individual insurance company policies
That's the practical evidence that the two pathways are additive rather than redundant in humans
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