What are the benefits of administering GHK-Cu through a nasal spray
(2004) In vivo regulation of extracellular signal-regulated protein kinase (ERK) and protein kinase B (Akt) phosphorylation by acute and chronic morphine
Food sources for increasing glutathione include sulfur-rich foods, dairy products, and more
This is very difficult to test directly in practice because it requires direct comparison of the extent of tolerance produced by morphine with opioids that exhibit comparable intrinsic efficacy for G protein activation but much higher efficacy for endocytosis than morphine, while ensuring equivalent receptor stimulation and duration of action
The practical advantages of topical: easy to apply, local delivery, lower systemic exposure, and you don't need a needle
Its kind of like getting a two-for-one deal, since not only do you get the considerable benefit of glutathione, you also get to reuse vitamin C and E