GHK-Cu

Ran independent HPLC verification — purity matched the included COA within 0.3%. Packaging arrived cold with intact seal.

Third order from this vendor. Batch-to-batch consistency has been excellent and lyophilization quality is top tier.

Vials are properly crimped, lyophilized cake is uniform, and the label/lot tracking is professional.

Customer support answered a technical question about storage within hours. Will be ordering the larger size next.

Vials are properly crimped, lyophilized cake is uniform, and the label/lot tracking is professional.

Have tested several batches by NMR — clean spectra, no detectable solvent residues.