Some users notice mild staining or a unique taste. Always follow usage instructions and consult a healthcare professional if concerned.
If you’re seeing green or blue urine after taking methylene blue, don’t worry—it’s totally normal!
Methylene blue is a vibrant blue dye, and as your body metabolizes it, the color can show up in your urine. Sometimes it’s blue, other times it mixes with the natural yellow of urine to create a green tint.
This is just your body eliminating the compound and is not harmful.
Expect the color change to last for several hours to a day or two depending on your dose and metabolism. If you're taking it regularly, the color might stick around longer.
🧪 Pro tip: Methylene blue can also tint other bodily fluids (like saliva or sweat), and even temporarily stain your tongue. All normal!
As always, if you experience anything beyond the color change—like pain, unusual odor, or other symptoms—reach out to a healthcare provider.