For many, tattoos allow people to express their style. But did you know that in the near future, tattoos may become a means of treating disease? Diabetics who monitor their blood sugar levels often have endure many needle pricks every day. However, Heather Clark of Draper Laboratory in Massachusetts is developing a new tattoo ink that changes color based on glucose levels inside the skin.

So how does it work? The dye is made up of tiny plastic nanoparticles. When the glucose is low, the particle is yellow and fluorescent, but when glucose levels increase, the fluorescence goes away and the particles turn purple. Though this tattoo would have to be periodically re-injected because it would shed along with the skin, it’s a major step up from the daily needle pricks!

Scientists hope that this technology will be up and running in the next five to ten years.

Source: Earth and Sky