It starts with a breath
Lumen is the world’s first hand-held, portable device to accurately measure metabolism.
Once available only to top athletes, in hospitals and clinics, metabolic testing is now available to everyone.
Unlock your metabolism
The CO2 concentration is measured using a unique breath maneuver, which is performed by inhaling a fixed volume of air through the Lumen device (dynamic to each individual), holding it for 10 seconds, and exhaling fully.