Spironolactone Spironolactone as a class is a potassium-sparing diuretic
Given the long safety record of these drugs, the low microdoses some people take carry minimal risk, even if the cognition-specific trials have not been done
Not safe under any circumstance
Ultimately, vitamin B12 shots provide a convenient and effective way to ensure that you avoid vitamin B12 deficiency over the long term
10.26402/jpp.2018.3.11 [DOI] [PubMed] [Google Scholar] Bedekovic V., Mise S., Anic T., Staresinic M., Gjurasin M., Kopljar M., et al
The key: co-formulation with an absorption enhancer (SNAC) creating a localized pH window in the stomach, transiently protecting the molecule during passage