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GHK-Cu is a naturally occurring peptide made up of three amino acidsglycine, histidine and lysinewhich binds to a copper ion, forming a compound the body uses as a repair signal

Specifications Scientific Name Glycyl-L-Histidyl-L-Lysine Copper Complex CAS Number 49557-75-7 Molecular Formula CHCuNO Molecular Weight 403.9 g/mol Physical Form Lyophilized powder Purity 99%+ Storage 20C, protected from light Storage & Handling Store per the product label and available manufacturer handling documentation, and follow standard laboratory protocols for handling

One sample contained only letrozole, another contained letrozole with stanozolol, and the third contained letrozole with ostarine (Table 2)

Several practitioners report that patients using peptides alongside physical therapy progress faster than those doing physical therapy alone, though this observation awaits controlled study

The legal status of peptides varies by jurisdiction and compound, and researchers should understand the regulatory landscape in their area