ghk-cu immunogenicity or antibodies or immune response GHK-Cu: The Peptide That Transforms Skin and Tissue Health – Calibrate IV GHK-Cu – Superior Peptide
Description
Heres a quick look at why people often choose this boost: 1

(PubMed) Watanabe F, Yabuta Y, Tanioka Y, Bito T

The better option depends on your treatment goal, comfort level, safety needs, and provider recommendation
If you dont get enough B12, it can affect many important functions of your body

No toxic or lethal dose was achieved across a remarkably wide range of doses from 0.006 mg/kg to 20 mg/kg