Methylene blue (ProvayBlue) is a medication doctors use to treat a rare blood condition called methemoglobinemia. Naturally, methylene blue is a solid. But as a medical treatment, it’s dissolved in ...
Wellness enthusiasts seeking to hack their way to health and longevity have a new favorite remedy — one that stains their tongues blue. Methylene blue has been around since the 1870s when it was used ...
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