ghk-cu naturally occurring in human plasma saliva urine GHK-Cu: What Is This Copper Peptide, and What Does the Science Actually Show? GHK-Cu Peptide | The benefits,

De Block C, Bailey C, Wysham C, Hemmingway A, Allen SE, Peleshok J

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Note: Due to the chemical nature of the copper chelate, researchers often utilize higher reconstitution volumes (e.g., 2ml or 3ml of bacteriostatic water) or co-administer with compounds like BPC-157 to mitigate localized post-injection irritation (PIP) frequently observed with this specific peptide

Since 5- reductase is produced in various cells, including the male and female reproductive tracts, testes, and ovaries, inhibition of DHT synthesis by local treatment is not effective, and only systemic administration will result in effective treatment