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The studies are still being conducted
Advanced delivery system studies in mice using GHK-Cu in ionic liquid microemulsion achieved hair follicle entry into early growth stages in 6 days compared to 8 days for standard GHK-Cu and 9 days for minoxidil, representing approximately 3-fold improved local delivery
They respond best to coordinated strategies that address multiple mechanisms
1 Most were issued on September 9, 2025, but the FDA continues to publish new letters
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