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Delta sleep-inducing peptide (DSIP): a review Graf MV, Kastin AJ Neuroscience and Biobehavioral Reviews (1984) This foundational review comprehensively analyzed the first decade of research on Delta Sleep-Inducing Peptide since its discovery in 1977, examining the evidence for its sleep-modulating, stress-protective, and neuroendocrine effects across numerous animal and human studies

X., Pickart, L., Laurent, M., Gillery, P., Monboisse, J

Instead, GHK-Cu appeared to act as a broad-spectrum homeostatic regulator, capable of resetting gene expression patterns in cultured cells towards those characteristic of a younger, more regenerative state

It was conducted at Seoul National University (one of Asia's top research institutions) with full IRB ethical approval