Last updated: October 2026. General background reading related to the topics covered on this site. We are not affiliated with or endorsed by any institution below.
Dietary Supplements
NIH Office of Dietary Supplements — what you need to know about supplements.
Zinc
NIH ODS: Zinc — general background and safety information.
Potassium
NIH ODS: Potassium — general background and safety information.
G6PD Deficiency
MedlinePlus Genetics: G6PD deficiency — general background on a condition that matters for methylene blue.
A Note on These References
These are general background reading only. They are not endorsements of any product and are not claims about the featured supplement. See our disclaimer.