Just when you thought your smartwatch could do it all, there’s more. Researchers at UCLA with funding from the National Science Foundation have designed a double-sided, thin adhesive film that attaches to the underside of a smartwatch. It analyzes the chemical makeup of droplets of sweat, tracking things like your glucose and lactate -- highly specific indicators of your health.  Giving you a real-time snapshot of how well your metabolism is working and what is happening inside your body.  While right now, the film only works with the team’s custom smartwatch and app to record data, they see the film someday being applied to popular models of smartwatches.