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Some, like GHK-Cu, are also available in topical forms

10.1038/ng.294 45 Sanz-CuestaT.Escortell-MayorE.Cura-GonzalezI.Martin-FernandezJ.Riesgo-FuertesR.Garrido-ElustondoS.et al (2020)

A single colony was inoculated in Luria-Bertani medium (20 ml) with kanamycin (25 mg l-1) and cultured at 37 C overnight

References Kraus D, Yang Q, Kong D, et al

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Nevertheless, uncertainties persist concerning durability of treatment effects, safety profiles, and appropriate candidate identification, requiring additional investigation before broader clinical implementation [1516]