Lumen, a pocket-sized device designed to “hack” and track your metabolism, officially launches today. The device (which resembles a vaporizer) features a hollow interior equipped to read your breath as it passes through. Essentially, it’s founded upon a simple equation: if you’re breathing out high amounts of CO2, you’re burning carbs, and if you’re emitting lower CO2 amounts, you’re burning fat. But the technology designed to capture that equation’s keystone metrics has long been costly and demanding, oftentimes requiring patients to sit for multi-hour breathing exercises (known as RER) and lengthy follow-ups. After a month of testing the device from home, we were impressed with its capabilities and sought out information on its inception.
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.
Like having your own personal nutritionist
Know what and when to eat to fuel your workout, improve your metabolic flexibility and support fat burn.
See how your metabolism is affected by your sleep, physical activity, and nutrition.
Customize your nutrition
Get daily personalized meal plans. Know exactly what to eat and when.
LUMEN device-metabolism Tracker.
The technology used in labs, now at your fingertips.
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.
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's technology has been scientifically proven to accurately measure metabolic fuel usage when compared to the gold standard (RER) for measuring metabolism in multiple validation studies. This device can not be returned after use..
LUMEN works by blowing air into the device