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Your metabolic health, in your hands

Understand your unique metabolism, promote fat burn, lose weight, and boost energy naturally.

Stick to science,
not trends

Once available only to top athletes in clinics, Lumen makes lab-level metabolic testing accessible. It’s the first-ever portable device validated to measure metabolism by tracking the CO₂ concentration in your breath.

Lumen reveals your body's fuel source, guiding you toward optimal metabolic health, so you can manage your weight, increase your energy, and discover a healthier you.

When science meets technology.

A healthy metabolism is flexible, switching between fuel sources based on availability and energy needs.

Your metabolic flexibility is directly influenced by the way you eat, exercise, sleep, and manage stress, and it’s the key reaching your health goals.

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Hear from the experts

The gold standard of personal metabolic tracking

Lumen meets the gold standard of metabolism measurement (RER) – as proven in multiple peer-reviewed validation studies.

Take a deep breath

Breathe into your Lumen each morning to find out whether your body is burning mostly fat or carbs, and to understand how your lifestyle is impacting your metabolic health.

Get the guidance that matters

Find your balance with personalized lifestyle and nutrition recommendations based on your metabolic measurements and daily activity.

Make every workout count

Take a breath before your workouts to find out if you need a snack to prevent muscle breakdown and maximize performance.

Understand your body

Unlock your metabolic health score each week to track your progress toward well-being and reaching your health goals.

A woman with a Lumen device and a cell phone in her hand looks at a man

Take control of your metabolism

Many of the factors that impact your metabolic health are within your control and can be changed to improve your body’s metabolic flexibility, which is your metabolism’s ability to efficiently switch between using carbs or fats as a source of energy.

Each morning, you’ll breathe into Lumen to see the source of your body’s energy: fats or carbs.

A man breathes into a Lumen device and holds a cell phone in his hand

Based on this metabolic data, Lumen will provide a daily personalized nutrition plan, as well as other actionable insights on your sleep, workouts, and meal timing. Lumen tracks your sleep, nutrition and exercise in order to provide you with a score that reflects how healthy your metabolism is.

Lumen trains your metabolism to use the food you eat more efficiently.

2 women in sportswear looking at Lumen app results

When your metabolism is more flexible, you are better able to burn fat instead of carbs. By focusing on metabolism instead of restrictive or unsustainable diets, Lumen helps you eat the right food for you and improve your metabolic health with daily feedback.

Scientific Research & Collaborations

Lumen is dedicated to the advancement of metabolic research, we partner with top institutions to expand the understanding of metabolism and its vital role in many aspects of human health.