In Iron Man 2, our hero Tony Stark manages to save the world from the military-industrial complex and create an entirely new chemical element, but still suffers through the inconvenient and mildly painful tribulation of numerous pin-prick blood tests a day.
Draper Laboratories, right down the street from Stark’s alma mater, MIT, has a solution. A scientist at the lab has successfully demonstrated an implantable nanosensor that changes color as chemical concentrations fluctuate in the bloodstream.