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Side Effects & Safety Considerations GHK-Cu has a well-established safety profile accumulated over decades of cosmetic use: Topical: Generally well-tolerated
One of the things they found was when B12 serum levels drop below 550 pg/mL, cerebrospinal fluid levels of vitamin B12 become low
Brain 142:31443157
J Biomed Sci
The nitrogen atoms on the histidine imidazole ring and glycine amine backbone coordinate with Cu with extremely high binding affinity, forming a stable bioavailable chelate complex
Peptides are short chains of amino acids
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