New wearable tracks hydration levels in real time

US – Researchers at the University of Texas at Austin have developed a non-invasive wearable that continuously monitors hydration levels in real time.

The lightweight sensor, tested in lab-controlled and 24-hour free-living trials, uses bioimpedance, which measures how electrical signals pass through body tissues, to detect hydration changes. Data is transmitted directly to a smartphone which then gives users insights into their fluid levels during daily activities.

This device provides a reliable alternative to traditional urine or blood tests, which are invasive and impractical for continuous use. Early studies showed strong correlations between arm bioimpedance readings and actual water loss, which underscores its accuracy.

With dehydration linked to reduced cognitive function, lower physical performance and conditions and illnesses such as kidney disease and heatstroke, the potential applications extend from athletic performance to occupational safety and healthcare.

Read our CES 2025: Six Trends to Watch report, where we highlighted a range of innovations bringing healthcare into the home through remote patient monitoring.