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n=21) found a 28% average increase in subdermal collagen density after 3 months of daily GHK-Cu gel application, with the top quartile showing 51% improvement measured via ultra-high resolution ultrasound imaging
This is often referred to as a washout period
Always choose high-quality brands with clear ingredient labels
Step 4 Collagen and skin support: Ascorbic Acid supports collagen synthesis, helping maintain healthier, more resilient skin as pigmentation improves
PMID 11468240
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