Can Light Measure Blood Glucose Levels?
Don’t expect to be free of finger sticks anytime soon, but in a study, researchers describe a device that uses light to measure glucose levels through the skin. Chemists have a long history of shining light on liquids and solids to determine what and how much of particular substances are present based on how the molecules absorb the light. Researchers applied this approach to measuring glucose levels through the skin by detecting the sugar molecule’s signature absorption of infrared light. They tested blood glucose levels from a person without diabetes before and after a glucose drink, using both their device and a professional blood glucose analyzer. The measurements tracked closely, suggesting that this method could someday be used to test blood glucose levels in people with diabetes.
Source: Review of Scientific Instruments, August 2013