ghk cu im or subq Subcutaneous Injection: What It Is and How to Give One Sublingual GHK-Cu vs Injectable GHK-Cu:

The grouping makes no combined-effect claim and is supplied strictly for in-vitro laboratory research use only.

Webb, L

It is a molecule naturally produced by the human body, and decades of clinical use across both topical and injectable applications have not identified significant adverse effects

Acetaminophen-induced Acute Liver Failure: Results of a United States Multicenter, Prospective Study

BPC-157: Supporting the Repair Environment When Healing Has Stalled Chronic injuries often exist in tissues with limited blood flow and repeated oxidative stress

Because it plays well with almost everything, it's commonly used as a base alongside other actives like niacinamide or vitamin C