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Description
A friend who works in aesthetics mentioned GHK-Cu as something worth researching

Reaction of formaldehyde with proteins
Composition GHK-Cu: 100 mg Appearance: lyophilized powder in a sealed research vial Research Focus (non-clinical) Peptide identity and purity assessment Assay development and calibration for quantitative analysis Chromatographic method optimization for impurity profiling Stability characterization of a lyophilized peptide under laboratory storage conditions Documentation Lot-specific COA available Batch and lot traceability Important Notice For research use only Not for human consumption Not intended to diagnose, treat, cure, or prevent any disease Quality & Manufacturing Lot-specific COA Lyophilized for transit stability

4c, Extended Data Fig

Amin MCIM, Butt AM, Amjad MW, Kesharwani P

Its effects differ depending on whether its used for TRT (hormonal normalization) or performance enhancement (supraphysiological dosing)
