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> It also turns your urine blue/green

Doesn't it also turn your internal organs blue/green?

Not concerning per se... but concerning.




I never looked. Seriously, methylene blue has been used as a drug for more than 100 years. IIRC, it’s the first drug the FDA approved. I think the body clears it reasonably quickly and I would not expect it to permanently stain your insides.




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