Lumen is the world’s first hand-held, portable device to accurately measure metabolism. Lumen measures your metabolism in a single breath and helps you lose weight and optimize your workouts. From metabolic tracking to personalized nutrition plans, Lumen is an effortless metabolic tracking and wellness coach all in the palm of your hand! Once available only to top athletes, in hospitals and clinics, metabolic testing is now available to everyone. With Lumen's daily insights, you will improve your metabolism by improving metabolic flexibility: your body's ability to shift efficiently between using fats or carbs as a source of energy Lumen is scientifically proven to meet the gold standard of metabolism measurement (RER) in multiple validation studies. The story behind Lumen: Lumen began with twin sisters Merav and Michal - two Ironman winners, and PhDs in physiology. As scientists and athletes, they were passionate about developing a way to provide personalized nutrition but knew the only way to measure metabolism was costly and time-consuming. So they teamed up with entrepreneurs with experience building large companies; Daniel, Dror, and Avi, and after two years of R&D, they developed the first Lumen prototype. Lumen measured metabolism in a single breath, in less than a minute, instead of an hour-long test in a lab! After four years of hard work and hundreds of beta users, the Lumen team launched on Indiegogo. Lumen broke the $1 million thresholds on IndieGogo in weeks, and now Lumen is leading the way in bringing personalized nutrition to the entire world.