Stack, dosage? Plus, nootropics? Other supps? Methylene Blue, Glutathione, C60, NR/NMN? Thanks! .... Plaque removing peptides/supplements?

Also looking at l- Carnosine, PHPD5, Cerebrolysin, Pinealon, Piracetam, Oxiracetam, Phenylpiracetam, Aniracetam, Nefiracetam, Other Nootropics, Tesofensine, P21 peptide.

Apparently, GHK-Cu, Selank, Semax, Cortagen, Epitalon might be better when delivered intranasally...? And possibly others?

Best dosages / stacks of any of the above / anything that seems to work, for my research subject? :)

I had seen Selank/Semax able to be administered intranasally, but until this research wasn't aware GHK-Cu would be possible. Please let me know if there are other peptides for intranasal use.
Also discovered some racetams are injected.