ghk-cu typical injectable dose mg per day How Much Should You Inject Daily? Doctor Explains GHK-Cu Dosage Guide: Typical Protocols,
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10.1074/jbc.M201750200 11 DingD.JiangH.ChenG

Cheeseman KH, Slater TF

Symptoms of deficiency include decreased appetite, weight loss, chronic diarrhea, lethargy and weakness, anemia, and neurological abnormalities

The main difference comes down to: Preservative vs no preservative