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.

How do you measure metabolism?

Before Lumen

The only way to measure your metabolism was in a hospital or clinic with a costly and time-consuming test known as RER (through the breath).

With Lumen

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, based on the RER metric.

Real-time accuracy

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.

When measuring metabolism, Lumens results are comparable to that of the gold standard.

Metabolic flexibility

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.
Learn more about metabolic flexibility

Getting to know you

Lumen is calibrated to your unique CO2 range and lung capacity.

Taking a breath

Each morning, Lumen determines the source of your body’s fuel — carbs or fats.

Receiving your plan

Lumen provides personalized nutrition recommendations and daily guidance on sleep, diet, exercise and more.

Start hacking your metabolism

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