"Revolutionary Smartphone Compass Technique for High-Sensitivity Blood Glucose Measurement"
Researchers at NIST have developed a technique using the magnetometer in smartphones to measure blood glucose levels with high accuracy. By attaching a tiny well containing a solution and a strip of hydrogel to a cellphone, they were able to detect changes in magnetic field strength caused by the hydrogel's reaction to glucose or pH levels. This low-cost method could lead to the development of inexpensive glucose testing kits that can be attached to smartphones, potentially revolutionizing at-home blood glucose monitoring.