FWIW
In my view this is one of the better videos on methylene blue gives very good overall explanation.
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Also heard it can be a healthy alternative that can be used for contrast dye imaging. Regular imaging dye is very TOXIC but not methlyene blue … some doctors will use it, but maybe it can also be requested.
I refused to have a spinal contrast dye a few years ago because it can harm organs like the thyroid. Methylene blue might be a good alternative.
A lead