UC San Diego engineers have introduced a battery-free electronic sticker that transforms everyday cups and bottles into real-time health monitors. 🧪🔬 The flexible device uses natural fingertip sweat to measure vitamin C levels without blood draws or lab visits. It harvests its own power, analyzes the sample and wirelessly transmits data within minutes. The technology offers a low-cost, accessible tool for tracking nutrition and expands what is possible in next-generation wearable health systems. Developed by teams in electrical engineering and nano engineering at ucsandiegoengineering #UCSD #UCSanDiego #NanoEngineering #ElectricalEngineering