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copper content in 1 mg ghk-cu SYNTHEX LABS Peptide For Hair & Scalp Serum – 2400mg | Water-Based Formula for Hair Softness & Shine | 4% Copper Peptides – Fast-Absorbing GHK-Cu Copper Peptide | Eon
Description
Proceedings of the Royal Society of London 77(519):405-420. [doi.org]

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Net peptide content is how much of a vial's dry mass is actually peptide versus salts and water

Injections of B6 may also be given to patients with impaired gastrointestinal absorption
