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GHK-Cu (molecular weight: 401.91 g/mol) is a naturally occurring copper-binding tripeptide studied for its role in skin biology, extracellular matrix remodeling, and wound repair models

[DOI] [PMC free article] [PubMed] [Google Scholar] [296].Lin Y, Roman K, Foust KD, Kaspar BK, Bailey MT, Stephens RL, Glutamate Transporter GLT-1 Upregulation Attenuates Visceral Nociception and Hyperalgesia via Spinal Mechanisms Not Related to Anti-Inflammatory or Probiotic Effects, Pain Res Treat 2011 (2011) 507029

RHONDA PATRICK: Theres stronger data, I think, on ubiquinone, which is the oxidized form