A 2023 safety review that analyzed 12 clinical studies involving 512 participants found that the most common side effects from topical GHK-Cu were transient redness (4.2% of participants) and mild itching (2.8%)
The main limitation of our meta-analysis is the small number of studies (together with small sample sizes) currently in the literature, with single studies only for the posterior cingulate cortex, the hippocampus, and the thalamus (none of which showed a difference in GSH levels between cases and controls)
Ang, L., Jaiswal, M., Martin, C
The synergy in these research combinations is based on their distinct yet complementary effects: BPC-157 is associated with localized tissue environmentstendon and ligament structures, gastrointestinal tissue, and muscle-tendon junctionsfocusing on vascular signaling, GHR interactions, and localized repair