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Research shows systemic effects require milligram-range dosing for GHK-Cu, while BPC-157 and TB-500 show activity at lower concentrations

Most lyophilized peptides remain viable for one to two years at four degrees, though some researchers report longer timeframes for robust sequences

Journal of the International Society of Sports Nutrition, 2(2), 3844

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)