glutathione regenerates vitamin e Liposomal outperforms plain glutathione in uptake, cell regeneration and systemic availability: evidence from cellular and human models | British Journal of Nutrition Celesta-Forte 250 L-Glutathione Soft Gelatin

From what I observe, RainShadow Labs also offers multiple pathways for brands to work with them depending on how much customization the client wants

The B12 in your compounded formulation should keep serum B12 levels adequate in most cases, but "most cases" is not "all cases." Verify with bloodwork rather than assuming

The exact frequency should be personalized: for example, someone using glutathione IV for chronic health support (like liver health or a neurological condition) might do two drips per week, whereas someone focused on general wellness or skin might start with once weekly

Our experience and the underlying science strongly suggest that not only can you use them together, but they may have a powerful synergistic relationship