A Campbridge labratory made a special ink that changes color depending on your blood glucose level. The ink is made of tiny spheres that contain the glucose detecting molecule, a color-changing dye, and another molecule that mimics glucose. If the molecules mostly latch onto glucose, the ink appears yellow. If glucose levels are low, the molecule latches onto the glucose mimic, turning the ink purple. A healthy level of glucose has a “funny orangey,” color, according to Clark. The sampling process repeats itself every few milliseconds.
Its a quite cool to show to your friends “Hey my blood sugar is low, see? it turns purple” hahahaha