Trusted by 300,000+ users
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Lumen aids in lasting, sustainable weight loss

Traditional diets and fasting plans guess what your body needs. Lumen instantly measures your metabolism, so you know exactly when to eat, fast, and move — no more guesswork.

Start your journey

How Lumen helps

Know exactly how long to fast for your unique body using Lumen, the only metabolic tracker that can personalize diet.
1

Take a breath. anytime

In 20 seconds, Lumen reveals what your 
body is burning for energy: carbs or fats.
2

Get your personalized plan.

Based on your real-time results, the app provides a tailored meal plan, carb recommendations, and daily macros.
3

Track your meals with
AI-powered food logging.

Log your meals in a snap using Lumen's
AI-powered food tracker to stay on top
of your macros and carb recommendations.
4

See real weight loss results.

The more you use the app, the more insights
and strategies you’ll unlock to supercharge
your metabolic health and weight loss.
Don’t waste another breath
Start your journey now
Buy Lumen today

Real people. Real results.

See how Lumen works for some of our 300K+ users who cracked the code to sustainable weight loss.

How your metabolism works

Your daily lifestyle choices impact your metabolic health, 
and you can see it all in your breath. 

Digestion
When you consume food, it first enters the stomach, where digestive enzymes begin to break it down. The partially digested food then moves into the intestine, where it’s further broken down into nutrients, including glucose and fatty acids.
Metabolism
Mitochondria, the powerhouses of your cells, burn glucose and fat from the food you eat, or your body’s carb and fat stores, into energy you use daily. When your mitochondria and your metabolism are healthy, your body can make energy efficiently.
Breath
By measuring your breath, you can determine whether your mitochondria are burning glucose or fat for energy. This helps you understand your metabolism and the impact of your lifestyle choices on your fat burning and weight loss.
How Lumen measures your metabolism
The most advanced technology and sensors
Lumen uses ​​CO2 sensors, flow meters, barometric pressure, and temperature sensing technology to determine whether you’re burning carbs or fats for energy and sends this data to the app.
The Lumen app
The app then reveals what your body is burning for energy, and provides insights and strategies to help you reach your weight loss goals.
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40+ integrations
Sync Lumen with your favorite health apps and wearables for a seamless, data-driven experience.

Benefits of using Lumen for weight loss

Experience fewer cravings and better appetite control
Get past calorie counting with data-backed insights
Experience fewer cravings and better appetite control
Burn more fat,

even at rest
Use carbs for energy

instead of storing them as fat
Eat enough to lose weight and avoid a slow metabolism
Finally understand your body and reach your weight loss goals.
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Innovative research,
groundbreaking applications

Lumen’s accuracy is clinically validated, giving you the confidence 
to let go of fad diets for good and trust your body’s own signals.