“Smart” tattoo will show health problems

Researchers from Harvard and the Massachusetts Institute of Technology have developed biosensitive inks that change color if something is wrong with the body.

Portable gadgets that monitor your health need to be constantly carried around and recharged. The researchers decided to fix this and came up with a new ink for “smart” tattoos.

“Smart” ink consists of a material that reacts to a change in the intercellular fluid in the body. Such a tattoo changes color from green to brown with jumps in blood glucose level, and also glows brighter if the concentration of sodium increases – the signal of dehydration of the body.

“Smart” tattoo can be done for life for chronic patients or for several months for temporary treatment. Also, they can be completely invisible and glow only, for example, from a flash smartphone.