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The Unflinching Truth About GHK-Cu Stability Claims Here's the honest answer: most GHK-Cu shelf life claims are based on lyophilized (freeze-dried) powder storage, not reconstituted solution storage

doi: 10.3390/v10080392

Initially investigated for its potential to treat neurodegenerative diseases like Alzheimers and Parkinsons, this small synthetic peptide is known to bind with high affinity to hepatocyte growth factor (HGF) and its receptor c-Met, thereby promoting neuronal differentiation, dendritic branching, and synaptic plasticity

therefore, an extraction method that yields optimal results for one species may not yield comparable results for another

Research in rats shows that the peptide substantially increases the rate of collateral blood vessel growth in the setting of ischemia [4]

These effects are generally no more bothersome than what you might feel after a flu shot or a routine blood draw