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The Science of Lumen

Backed by science
Trusted by researchers

Research with Lumen
Featured study

Lumen RER Validation Study

Lumen’s accuracy has been validated with San Francisco State University (SFSU). This study shows the validity of Lumen to estimate metabolic fuel utilization via %CO2, in agreement with the RER measured by the “gold-standard” metabolic cart, providing real-time metabolic information for users anywhere.


Peer-reviewed papers and research

Explore the cutting-edge research and peer-reviewed studies that support Lumen and its impact on metabolism.

Scientific collaboration

Research partnerships with leading institutions in the scientific community to advance the understanding of metabolism.

Research with Lumen

How Lumen works

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.

By measuring the CO2 level with the exhale flow rate, Lumen identifies the source of energy the body is using, carbs or fats.

The science is the same, but with cutting-edge technology

Lumen has been validated in peer-reviewed research to match the gold standard of measuring RER.

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Before Lumen
The only way to measure your metabolism was in a hospital or clinic with a costly and time-consuming test known as Respiratory Exchange Rate (RER).
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With Lumen

Developed by researchers, Lumen uses RER as the core data point to bring the same measurement to a home environment by measuring the CO2 in your breath through the sensor and flow meter

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How researchers use Lumen

Unlike metabolic carts, Lumen measures breath CO2 in under 30 seconds, providing real time data.

Measurements can be taken in a lab or remotely, and results are delivered in real time through a simplified research-friendly version of the Lumen app. Data is also stored for later reference.

Lumen does not measure oxygen levels or consumption.

Research collaborations with the scientific community

Research with Lumen
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Woman breathing into a Lumen device

Research with Lumen

Use the Lumen device in your research, or do a joint research project with us