Unfortunately, several factors impair the bodys ability to manufacture glutathione, including illness, ageing, stress and nutrient deficiencies
Injectable GHK-Cu aims to restore youthful systemic signaling something topical GHK-Cu formulations can do, but not at the therapeutic concentrations achieved via injection
These formulations are designed specifically for the periocular zone
This is why insulin, for example, must be injected
A citation shows that a paper exists
Along those lines, a quick online search does not show that the FDA has even classified 5-amino-1MQ as generally regarded as safe, which is the first step in making it available as a supplement