Wearable Sweat Sensor Developed for Real-Time Vitamin Monitoring
Researchers have developed a wearable device capable of monitoring vitamin levels in human sweat in real-time. This non-invasive technology, detailed in a study published in Nature Communications, uses a flexible skin patch to detect trace vitamins, particularly vitamin B9, after food and supplement intake. The device employs a screen-printed multiplexed electrode array to simultaneously detect multiple vitamins, pH, and ionic strength. It uses a nanocomposite of gold nanoflowers and sulfur- and nitrogen-codoped carbon to enhance electron transfer and surface area for biomolecule attachment. The study highlights the potential of this technology to provide personalized nutrition monitoring, addressing the global issue of 'hidden hunger' where individuals consume enough calories but lack essential micronutrients. 
