comprehensive look at the expanding field of wearable technology in healthcare, focusing on both the commercial market and critical regulatory and technical challenges. One set of texts describes the booming market for wearable devices, including smart rings, watches, and specialised trackers from companies like Garmin, Apple, and Samsung, highlighting their use for fitness, sleep, heart rate, and chronic condition monitoring. Complementary academic and legal articles address the challenges in clinical integration and regulation, noting that while platforms exist to integrate patient-generated health data (PGHD) with electronic health records (EHR), issues of usability and the vast quantity of sensor data persist. Furthermore, several sources critically examine the security, privacy, and regulatory oversight of these devices, pointing out that direct-to-consumer tests often lack expected HIPAA protections and that the US Food and Drug Administration (FDA) is grappling with classifying devices that bridge "general wellness" and certified medical functions, particularly regarding accuracy across diverse populations. Finally, a technical paper validates a novel wearable biosensor for continuous glucose monitoring, demonstrating significant advancements in accuracy and user comfort, which is crucial for managing conditions like diabetes.