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TL;DR: The Best Peptide for Hair Growth GHK-Cu (copper peptide) is the clear winner
Electrolyte balance matters alongside hydration
Designed to be injected once a week in the stomach, thigh, or arm, it imitates a hormone in the body called glucagon-like peptide-1 that we naturally yield in our intestines
This is consistent with the published epithalon research to date
Different studies use different concentrations, delivery systems, endpoints, and model organisms
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