in Clinical Pharmacology & Therapeutics found subcutaneous injection reached peak plasma concentration (Tmax) at 75 minutes versus 38 minutes for IM, but area-under-curve (total bioavailability) was statistically equivalent at 94% versus 97%
Additionally, it helps stimulate facial hair growth and enhance beard thickness over time
Iantomasi, T., Favilli, F., Marraccini, P., Magaldi, T., Bruni, P., & Vincenzini, M
Long-term or chronic toxicity data do not exist
Pickart, L., The human tri-peptide GHK and tissue remodeling, Journal of Biomaterials Science, 2008.What is GHKCu
Self-reinoculation with fecal flora changes microbiota density and composition leading to an altered bile-acid profile in the mouse small intestine (in Eng)