Research overwhelmingly describes the safety of GHK-Cu positively, such as when the authors of a 2018 review called it a safe, inexpensive, extensively studied compound.14 However, even though copper peptides have demonstrated an impressive safety track record in studies, there are (as with most skin care actives) a few safety risks to consider
Glucagon-like peptide-1 (GLP-1) is a growth factor and insulin-stimulating hormone that can activate the same effector molecules as insulin, and its receptor (GLP1R) is expressed in neurons
Self-monitoring during use should note any new lumps, bumps, skin changes, unexplained weight loss, fatigue, or other symptoms that could potentially indicate cancer development
Missed Dose: If you miss a dose, take it as soon as possible unless it is nearly time for your next dose