Burning Fat or Carbs? Lumen Metabolism Tracker Review 2024

If you like to use your iOS or Android mobile, or Apple Watch as part of your health and fitness journey, you might value all the data they can offer. While that can include ways to track calories burned and consumed there hasn’t been an easy way to do metabolic testing at home outside of expensive tests at clinics. Now a breakthrough handheld device called Lumen is making metabolic testing available to anyone and lets you know how to achieve optimal athletic performance, lose weight, build lean muscle, and more with a personalized nutrition plan. Better yet, Lumen has a great iOS app with Apple Health integration.

So in this article, we’ll see what’s Lumen and review it which can help you decide if you should buy or not.

If you like to use your iOS or Android mobile, or Apple Watch as part of your health and fitness journey, you might value all the data they can offer. While that can include ways to track calories burned and consumed there hasn’t been an easy way to do metabolic testing at home outside of expensive tests at clinics. Now a breakthrough handheld device called Lumen is making metabolic testing available to anyone and lets you know how to achieve optimal athletic performance, lose weight, build lean muscle, and more with a personalized nutrition plan. Better yet, Lumen has a great iOS app with Apple Health integration.

So in this article, we’ll see what’s Lumen is and review it which can help you decide if you should buy it or not.

Table of Contents: Lumen Metabolism Tracker Review 2023

What’s Lumen Metabolism

Lumen is a home use, handheld device. It uses your breath to tell you if you’re burning fat or carbs. According to your goal and your results, it then gives you dietary recommendations.

A big element of training or weight loss is understanding what kind of fuel your body is using up. By understanding, if you are burning carbs or fat, you can reach your goals faster.

Lumen’s goal is to help you “hack” your metabolism so that you’re capable of “metabolic flexibility”—meaning your body can efficiently shift between using carbs and fats as fuel—which is a result of time-restricted eating like intermittent fasting, exercising, and “macronutrient manipulation,” or the process of altering the amount of protein, carbs, and fat you consume. This flexibility can improve your insulin sensitivity, which will help your body effectively burn fat. It will also make your blood glucose levels more consistent, resulting in more energy and fewer cravings, and help you sleep better and strengthen your immune system.

Lumen is priced at US$349 and does not require a subscription or cartridges

How Lumen Metabolism Works

Lumen works by measuring Carbon Dioxide levels from your breath and analyzing your metabolism. It has a user-friendly app that guides you along the way. With each breath, you are given a score on your fat or carbohydrate-burning levels. Over time, you are given a score for your metabolism flexibility.

You can learn more here are some of the core benefits of metabolic flexibility.

Prior to Lumen, this information about your metabolism required professional testing. Lumen has provided an option to bring this technology home, in the palm of your hand. Unlocking the secret to your metabolism lies in your breath.

The app’s algorithm learns your metabolism and gives you a calibrated meal plan. Your meal plan provides you with the number of carbs and protein you need to consume for the day, according to your body’s needs. If your goal is weight loss, the app also recommends overnight fasts to get your body into fat-burning mode.

Lumen really is like having a “nutritionist in your pocket”. It gives you the power to “hack your metabolism” as they put it.

How to Use Lumen

The device is generally easy to use, though it’s sometimes difficult to get an accurate reading. The app (Android or iPhone) instructs you to inhale through the device until a colored ring pictured on the screen expands to meet the outer circle. If you go even a fraction of a second too long, you have to try again.

After holding your breath for 10 seconds, you exhale through the device until the ring on the screen disappears. You have to keep your exhaling steady, to keep an additional onscreen ball in the middle of a bar (as pictured in the screenshot above). This is less prone to error, though you’ll again have to start over if you blow out with too much force. The whole process is tough. I got so frustrated a few times that I had to set it down and take a break.
Once you succeed at breathing through the device two to three times this way, the app gives you a score of 1 to 5, which tells you if you’re burning mostly fat (1-2) or mostly carbs (4-5); level 3 means you’re in the middle.

You need to use the Lumen every day for at least a month to get your flex score (a big commitment), because it’s determined by your daily morning measurements and measurements after high-carb meals. The score ranges from 0 to 21, and I got a 6.7, which means I have low flexibility. Basically, I have some work to do, which isn’t surprising. Eating and living healthy is a new journey for me, but after using it for six weeks, I do feel equipped to continue eating right.

Review Verdict

Like having a personal nutritionist, it’s very easy to understand nutritional advice. And the biggest benefit of Lumen is that it offers live actionable data based on personalized goals while remaining super convenient to use. Lumen changes all that with the ability to analyze your metabolism in a few minutes with a few breaths in a form factor that’s easy to carry with you anywhere.

On the other hand, Lumen is quite expensive, and the food log feature feels missing in the app. Additionally, it integrates step counts from Google Fit; but we would like to see more metrics like sleep quality and detailed workouts integrated as well. This will help better visualize how the meal plans influenced those results as well. The company recently partnered with Garmin to integrate more health data; and we hope that the same will be available soon for Wear OS, Fitbit, and Apple Watch users too.

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FAQ:

Q1: What is the Lumen Metabolism Tracker?

A: The Lumen Metabolism Tracker is a device that measures your metabolism by analyzing your breath.

Q2: How does the Lumen Metabolism Tracker work?

A: The Lumen Metabolism Tracker uses a CO2 sensor to analyze the ratios of carbon dioxide in your breath, which indicates the type of fuel your body is using for energy.

Q3: What can I learn from using the Lumen Metabolism Tracker?

A: Using the Lumen Metabolism Tracker, you can learn whether your body is currently burning fat or carbohydrates for fuel and receive personalized recommendations to optimize your nutrition and fitness routines.

Q4: Is the Lumen Metabolism Tracker accurate?

A: The Lumen Metabolism Tracker has been validated against laboratory-grade metabolic carts and has shown to provide reliable and accurate results.

Q5: How do I use the Lumen Metabolism Tracker?

A: To use the Lumen Metabolism Tracker, simply breathe into the device for 1 minute and wait for the analysis to be completed. The results will be displayed on the accompanying app.

Q6: Can I use the Lumen Metabolism Tracker for weight loss?

A: Yes, the Lumen Metabolism Tracker can be a valuable tool for weight loss as it helps you understand how your body responds to different foods and activities, allowing you to make informed choices.

Q7: Is the Lumen Metabolism Tracker suitable for everyone?

A: The Lumen Metabolism Tracker is suitable for adults aged 18 and above. However, if you have any pre-existing medical conditions or are pregnant, it is recommended to consult with a healthcare professional before using the device.

Q8: Can I sync the Lumen Metabolism Tracker with other fitness apps?

A: Yes, the Lumen Metabolism Tracker can be synced with popular fitness apps such as Apple Health and Google Fit to provide a comprehensive view of your health and fitness data.

Q9: How often should I use the Lumen Metabolism Tracker?

A: For best results, it is recommended to use the Lumen Metabolism Tracker daily, preferably in the morning before consuming any food or beverages.

Q10: Does the Lumen Metabolism Tracker require any maintenance?

A: The Lumen Metabolism Tracker does not require any specific maintenance. However, regular cleaning of the device and ensuring it is charged will ensure optimal performance.

2 thoughts on “Burning Fat or Carbs? Lumen Metabolism Tracker Review 2024

  1. In a hospital or clinic setting, metabolism is measured by the respiratory exchange ratio, or RER, which is the ratio between the amount of carbon dioxide produced in metabolism and the oxygen used. This measurement estimates if your body is using carbs or fat for energy. The Lumen has a sensor and flow meter in it that uses the data from the RER tests to get that measurement at home

  2. Great review! The Lumen was designed by twin sisters Michal and Merav Mor, both with PhDs in physiology. They were looking for an easy way to track their metabolism during training for an Ironman race, and they created a small Bluetooth-connected device that measures the CO concentration in your breath and determines if your body is burning fat or carbs. At first glance, the Lumen kind of resembles a vape pen, which could make it go almost unnoticed if you were measuring your breath in pubic.

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