is ghk cu better injected or topical GHK-Cu actually worth it?” is genuinely one of the most common questions in my comments, so let me finally answer it properly. The short version: copper peptides have real research behind GHK-Cu Peptides Before and After:

95%CI = 1.11-2.24, respectively)

While a blood test is the definitive way to diagnose a clinical deficiency, it isnt always required to start B12 injections for general wellness purposes

500mcg per dose, pre-measured, no powder to weigh, no refrigeration faff

2024 [cited 2025 Mar 14]

For standard research protocols, the 10mg vial at $90 is the most accessible option at $9.00 per mg

High Performance Liquid Chromatography and Mass Spectrometry High Performance Liquid Chromatography-Mass Spectrometry analyses were performed on a Shimadzu Nexera UHPLC chromatograph interfaced with an Ab Sciex 3200 QTRAP mass spectrometer (AB SCIEX, Toronto, ON, Canada)