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A: In vitro studies involve cells in a controlled environment, using molar concentrations (M), while in vivo studies involve whole organisms and use weight-based dosages (mg/kg)

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Some of its functions are: (a) Collagen synthesis and tissue repair: GHK-Cu helps with skin health, wound healing, and connective tissue repair because it activates fibroblasts (cells which produce collagen/elastin)

While this property remains partially characterized, it explains reported benefits for conditions involving brain and spinal cord tissue

doi:10.1007/s00125-007-0793-y

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