Trying to separate three different claims about GHK-Cu: that it is the right molecule, that it is the right dose, and that it does something useful.
Sample size, blinding, and who paid for it. Those three questions kill most of the confidence in most of these threads.
Cold storage, light protection, and a date on the vial. Boring, and it removes half the variables.
If you need three other compounds to notice the first one, you have not tested the first one.
Happy to be corrected on any of the above.
Is a baseline blood test really necessary before starting something like this?
Stupid question: how do you know whether what is in the vial matches the label at all? How long have you been on GHK-Cu?
Loose evidence is not nothing, but a washout either side is the only reason to trust your own take.
Is a baseline blood test really necessary before starting something like this?