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[2] This sulfhydryl group allows for interaction with a variety of biochemical systems, hence the abbreviation GSH for its active form
This represents direct evidence of the mechanism at the cellular level, though its translation to clinical longevity outcomes in humans continues to be studied
FDAs published GHK-Cu concern applies specifically to compounded injectable products, not this nasal spray, but highlights limited human safety data and peptide-quality considerations
All four peptides are research compounds
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