How does Lumen measure metabolism?

Lumen measures the concentration of CO₂ in your breath using a built-in sensor. This reading helps determine whether your body is primarily burning carbohydrates or fat for fuel — a metric known as the respiratory quotient.

Do I need a subscription in addition to buying the device?

Yes, Lumen operates on a device plus subscription model. The device is a one-time purchase, while the monthly or annual subscription unlocks access to personalized analyses and recommendations within the app.

Is Lumen suitable for athletes?

Absolutely. Lumen is especially valuable for athletes looking to optimize their nutrition around training, improve endurance, and manage body composition using precise metabolic data.

How long does it take to see results?

Most users begin noticing trends in their metabolic flexibility after 2 to 4 weeks of consistent use. Significant changes in body composition may take several months of sustained effort.

Does Lumen integrate with other health apps?

Yes, Lumen integrates with Apple Health and Google Fit, allowing it to cross-reference sleep, activity, and nutrition data for even more refined and accurate recommendations.

Lumen

Optimize your metabolism with AI-powered breath analysis

CertifiedLaunched in 2014

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ComplexityVery accessible

Origin

🇮🇱Israel

Ideal for

Individuals

ComplexityVery accessible

Origin

🇮🇱Israel

Ideal for

Individuals

About Lumen

Strengths

Real-time metabolic measurement via breath analysis
AI-generated personalized nutrition plans
Daily tracking of metabolic flexibility
Integration with sleep and physical activity data
Intuitive and easy-to-use app interface
Recommendations that improve with continued use

Limitations

High cost: device plus monthly subscription
Requires consistent daily use for optimal results
Physical device may be inconvenient for some users
CO₂-based measurement is an indirect metabolic method

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Features

Mobile App

French interface

GDPR Compliant

Free Plan

Pricing

User reviews

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Quick info

Price

Paid

Starting from 19€/mo