how often do u inject ghk cu GHK-Cu Dosage Guide: Typical Protocols, Injection & Topical GHK-CU Peptide Dosage: Complete Guide

Avoid injecting in the same place every time

1% GHK-Cu in a well-formulated base sits in the range most commonly used by cosmetic chemists and skincare researchers

Used at 1 mL per day, a 60 mL bottle lasts about 60 days-roughly two months-before youll need a refill

What the Hair Routine Targets

Think of it as a well-designed experiment that needs to be repeated on a much larger scale to confirm the findings

doi: 10.3389/fphar.2025.1704083 Received 12 September 2025 Revised 16 December 2025 Accepted 18 December 2025 Published 21 January 2026 Volume 16 - 2025 Edited by Chen Ling, Fudan University, China Reviewed by Wentao Jia, Changhai Hospital, China Jie Cheng, Jiangsu University of Science and Technology, China Updates Copyright 2026 Li, Zhang, Li and Zheng