Metabolism Tracker

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Get 10% off when ordering two devices.
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Try Lumen risk free for 30 days
We know you will love your Lumen but If for any reason you are not 100% satisfied, return your Lumen for a full refund no questions asked.
icon of ribbon
icon of a truck
Try Lumen risk free for 30 days
We know you will love your Lumen but If for any reason you are not 100% satisfied, return your Lumen for a full refund no questions asked.
Non invasive
No needles, just a breath
Unlimited use
No cartridges needed
Highly accurate
Meets the gold standard
On-the-go testing, use at home, the gym and traveling
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Scientifically validated & Peer-reviewed
Peer-reviewed research evaluating Lumen validated that it matches the gold standard of measuring metabolism.
Lumen integrates with
Apple Health
Google Fit
Garmin IQ Connect

What you get

the lumen metabolism tracker
Lumen device
$349 value
charging dock for the lumen metabolism tracker
Charging dock
usb-c cable for lumen charging dock
USB-C cable
travel case for the lumen metabolism tracker
Travel case
screenshot from the lumen app, ios phone
Lumen app
  • Custom wellness plans
  • Daily metabolism insights
  • Daily personalized meal plans
  • Workout nutrition guidance
iOS / Android
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Premium support

Technical specifications


iOS compatibility (iOS 11 and higher)
iPhone 6 and more recent

Android compatibility (8.0 and higher)
Recommended higher than 720 x 1280 pixels

Bluetooth connectivity
Bluetooth Low Energy needed

Application connectivity
Apple Health Kit
Google Fit

*Cannot be set up from a computer


Conditions of use
Not water resistant or water proof
Operating temperature: 15°C to 40°C (59°F to 104°)
Storage temperature: -30°C to 70°C (-22°F to 158°)

CO2 sensor

Single battery charge lasts
Up to 14 days in normal use
Lithium polymer battery

Dimensions and weight
Lumen device: 102mm x 41.4mm x 33.3mm, 75g
Docking station: 14.5mm x 79.5mm x 68mm, 145g
Connections: USB-c


How will metabolic flexibility improve my health?

Your metabolism powers everything that happens in your body. By training it to be more flexible, and switch more easily between burning carbs and fat, you can improve many aspects of your well being. From work-outs and weight loss to sleep and longevity.

Can Lumen help me lose weight?

A more flexible metabolism makes it easier to lose weight, with Lumen you'll train your body to switch more easily from burning carbs to fat. Many users find this helps them with weight loss. Additionally if you select a weight loss track in the Lumen app, Lumen designs your nutrition plan in a way that supports healthy and sustainable weight loss.

Is Lumen good value?

In the past, the only way to get a single "gold standard" measurement was to spend 45 minutes lying very still in a specialist lab, connected to equipment, these tests cost up to $350+ per a single measurement. With Lumen you have the same tech at your fingertips and can measure your metabolism from the comfort of home, in minutes not hours and for the first time with a personalized daily plan to not only measure but also reach your health and wellness goals.

Is Lumen the same as Keto?

Reaching a state of ketosis usually requires extended deprivation from consuming carbohydrates. Lumens methodology isn't about cutting out carbs but rather incorporating healthy carb rich foods into your diet, while training your body to shift more efficiently between using carbs and fats as a fuel source and maintaining a healthy state of fat burn.

For more info read this article on the subject.

Has Lumen’s technology been validated?

Yes. Lumen has been validated in multiple studies as well as peer-reviewed and scientifically proven to be as accurate as the gold standard for measuring Respiratory Exchange Rate (RER) . Read the peer-reviewed paper.

Is Lumen considered a medical device?

No. Lumen is a wellness product that helps you measure and track your metabolism.It does not diagnose, treat, cure or prevent disease, and its recommendations are not medical advice. Always speak to your doctor if you have any concerns about your health.

What's the returns policy?

We want you to be completely satisfied with your Lumen. So please reach out to Customer Support if you're having problems. But if you decide Lumen is not for you, just return it within 30 days of receiving it for a full refund. Read our full refund policy.

How long is the warranty?

One year. So if your device or charging dock develop a fault caused by manufacturing defects within 12 months of purchase, we'll fix or replace them free of charge. Accidental damage is not covered. Read our full warranty policy.

Who is Lumen for?

We created Lumen to help people above the age of 16, improve their metabolic flexibility so they can enjoy better work-outs, improved sleep, easier weight loss and happier, longer lives. however there are certain conditions and diseases which can impact the Lumen results and therefore we do not recommended Lumen for people with the following:

Who should not use Lumen?
Conditions affecting the measurements:
  • Diabetes
  • Obesity - BMI over 40 kg/m2
  • Severe asthma
  • COPD
  • Pregnancy
Additionally Lumens nutritional recommendations may not be suited for people with:
  • Kidney disease
  • Cancer
  • Thyroid disorder
For other medical problems, please check with your doctor first.