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Epitalon Preparation Prof Khavinson (Saint Petersburg, Russia) kindly provided the tested peptide Epitalon, which was dissolved in water at a stock concentration of 100 g/mL, then further diluted to prepare the three concentrations for testing (20, 40, and 60 ng/mL)

Licensed 503A compounding pharmacies can now prepare both topical and injectable GHK-Cu under a physicians prescription, following the April 2026 reclassification that restored injectable GHK-Cu to Category 1 status

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