Color changing tattoo to indicate disease

“Dynamic tattoos have been in development for years, with early prototypes being able to successfully pick up changes in sodium, glucose, electrolytes or pH levels in animal models. Among the most intriguing developments was a cancer-detecting tattoo consisting of engineered skin cells reported in 2018. Blood calcium levels are typically elevated in many types of cancer. Here, the implantable sensor consists of calcium-sensing cells that produce melanin (the natural skin pigment) in response to rising blood calcium levels, thus creating a visible color change on the surface of the skin.” MORE

Image Credit:   MedGadget.com