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TB-500 is based on a part of TB4, so it should, in theory, have a similar safety profile, but studies specifically analyzing its safety still need to be conducted

Skin biology labs tend to study a handful of overlapping areas when GHK-Cu is involved, since collagen activity rarely happens in isolation

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"Signaling by IL-6 promotes alternative activation of macrophages to limit endotoxemia and obesity-associated resistance to insulin." Nature immunology 15.5 (2014): 423-430

Decreased hydration, reduced proteoglycan content, loss of disc height, annular fissuring, and ingrowth of nerve and blood vessels (Fujii et al., 2019) are observed in degenerating discs