Nobody likes getting blood drawn. But a new technique could make it easier to check on your blood without actually drawing blood, using fluorescing nanoparticle tattoos.
By injecting nanoparticles into the skin that fluoresce when they come in contact with a specified molecule, researchers were able to track changes in levels of sodium and glucose using a modified iPhone. The phone tracked slight changes in the level of fluorescence, which was directly related to the molecules in the blood.
Sure, getting a tattoo of nanoparticles is probably even less fun than simply getting your blood drawn, but for people like diabetics who need to draw blood daily, this could be a great solution.