Lumen helps people improve their health and fitness through technology on the forefront of personalized nutrition and metabolism. Conceived and designed by twin sisters, physiology PhDs and Ironman winners, Lumen harnesses the power of our breath to measure metabolism, which is closely linked to weight management, fitness and health. The Lumen device measures metabolism in a single breath, in less than a minute, which previously was only possible through an hour-long lab test. In collaboration with San Francisco State University, Lumen has been published and peer-reviewed for an ongoing study launched in 2020, which shows the validity of Lumen® to detect changes in metabolic fuel utilization in a comparable manner with a laboratory standard metabolic cart, providing the ability for real-time metabolic information for users under any circumstances.