The Cleveland Clinic lists common side effects of methylene blue, including blue urine, nausea, vomiting, skin discoloration, dizziness, and headaches. Some studies also suggest that taking it in ...

Now, the interesting thing about methylene blue is that, if ingested, it can temporarily change a person's urine colour. The effects range from a faint green tint to a bright blue stream. "For the ...

Green pee can be caused by green or blue food dye in things like cereals, ice cream, and candy. If you have a UTI, your urine may appear green because of bacteria called pyocyanin. Green pee may ...