It should never be shaken vigorously
Researchers who have mapped its activity describe GHK-Cu as a peptide that switches on a wide set of repair-related genes, which is part of why a supervised copper peptide protocol like GHK-Cu therapy is studied for both skin and scalp health
Barrier backup during dose escalation phases is a reasonable precaution
Curcuminoids may interfere with the activity of efflux drug transporters of the ATP-binding cassette (ABC) family, including P-glycoprotein, multidrug resistance protein (MRP), and breast cancer-resistant protein (BCRP), which function as ATP-dependent efflux pumps that actively regulate the excretion of a number of drugs limiting their systemic bioavailability (116, 117)
The long name covers a nice sunscreen agent and quite a special one at that: It's a " hybrid " sunscreen meaning it's half-way between physical (the ones that, at least partly, reflect the sun) and chemical agents (that absorb the rays, which most sunscreens do)