doi: 10.1186/s13041-022-00942-7
(a form of B12 deficiency) for more than 45 years
It helps preserve the Peptide solution for a longer period
It has indeed been shown that, when available for the host cells, GSH plays an important role in the protection of cells against oxygen radicals, detoxification and metabolisation of various endo- and exogenous compounds, cell cycle regulation, cell signaling and apoptosis 16,50,51,52
You do not necessarily have to choose one over the other, as they support the body in complementary ways, but identifying your primary "friction points" can help you prioritize
They can also help you practice until you feel confident about giving your insulin dose