Add Yahoo as a preferred source to see more of our stories on Google. This vibrantly colored chemical was originally created for use as a fabric dye. Kittisak Kaewchalun via iStock/Getty Images Plus ...

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 ...

The internet is abuzz with tributes to a liquid chemical called methylene blue that is being sold as a health supplement. Over the past five or 10 years, methylene blue has come to be touted online as ...