That is a much safer option
the individual-compound trials that do exist are small, decades-old, and often in patient (not healthy-adult) populations
The molecular weight of the tripeptide GHK (Glycyl-L-histidyl-L-lysine) is approximately 340.4 g/mol
10.1186/s12943-020-01258-7 Summary Keywords ulcerative colitis, GHK-Cu, SIRT1/STAT3 pathway, co-culture system, network pharmacology, molecular docking Citation Mao S, Huang J, Li J, Sun F, Zhang Q, Cheng Q, Zeng W, Lei D, Wang S and Yao J (2025) Exploring the beneficial effects of GHK-Cu on an experimental model of colitis and the underlying mechanisms