It has been quite some time since wearable technology has been used to monitor health. Now researchers have developed a thin adhesive film that could upgrade a consumer smartwatch into a powerful health-monitoring system. The system looks for chemical indicators found in sweat to give a real-time snapshot of what's happening inside the body. According to the study from the University of California Los Angeles (UCLA) published in the journal of Science Advances the researchers engineered a disposable double-sided film that attaches to the underside of a smartwatch. The film can detect molecules such as metabolites and certain nutrients that