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More work is needed to determine if the synthetic analog of PregS, PREG hemisuccinate, has the potential to overcome the limitations associated with systemic administration of PregS
Cell viability for GHK-Cu was previously investigated by Hairui et al, showing no significance difference between the control and the GHK-Cu treated group at the same concentrations and time points, implying the non-cytotoxic nature of GHK-Cu towards HaCaT 11
Changes in Zinc Levels Long-term, high-dose glutathione supplementation may lower zinc levels over time
There's some work- Rhonda Patrick: The animal steps
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