Lumen Metabolism Tracker Review: Smart Health Tool or Gimmick?

Lumen helps to measure your metabolism through breath analysis and guide smarter nutrition choices. Find out if this innovative device really works before buying.

We independently research, review, and recommend the best products. Healthcare professionals review articles for medical accuracy. When you buy through our links, we may earn a commission. Read more about our process for evaluating brands and products.

In This Review

Overview

You do your best to eat right and try to stay active. But in a way, your body still feels off. Some days you are full of energy. Other days, not so much. And you don’t really know why.

Things are just getting confusing with no clear answer. Just wondering what’s wrong.

So people start looking for something that can explain what’s going on inside the body. No guesses. Something real.

That’s where Lumen comes in. In this Lumen review, we’re looking at a small device that tracks your metabolism through your breath and helps guide what you should eat each day.

But does Lumen work? Is Lumen safe?

We looked into how it works, Lumen price, and real Lumen reviews. Let’s begin.

What Is Lumen?

Lumen is a small device that helps you check your metabolism. It’s for people who want to know if their body is burning fat or carbs.

You just breathe into it. That’s it. It gives you a simple result, then shows you what to do next through its app.

The Lumen device uses your breath to guide your daily food choices. We looked into it, and it focuses on making things easy to understand and resolvable.

The brand says it helps you stay on track with food and energy. So, in simple terms, Lumen helps you understand your body and make better choices each day.

How Does It Rate

Overall Rating: 4.8
LumenLumen

Features

3.8/5Features
Value for Cost

4.8/5Value for Cost
Return Policy

4.7/5Return Policy
Safety

4.8/5Safety

Brand Highlights

  • Made by Lumen, a brand focused on metabolism and daily nutrition
  • The company builds small devices that reads breath to track metabolism
  • Provides a 30-day return policy for unused devices purchased directly from the official website
  • Gives access to premium app plans for tracking, coaching, and personalized nutrition guidance
  • Includes a 1-year warranty that covers defects and device issues under normal use

Pros

  • Helps you track if your body is burning fat or carbs
  • Simple to use, just breathe into the device
  • Comes with an app that gives daily food guidance
  • Non-invasive, no pills or supplements needed
  • Helps build awareness of your metabolism over time
  • Uses research-based method to guide decisions

Cons

  • Only available through the Lumen official website
  • Needs daily use for best results and progress

About the Manufacturer

Lumen is made by a company that focuses on metabolism and daily nutrition. From what we saw on the official website, the brand was founded by twin sisters Merav and Michal Mor, both with PhDs in physiology and strong athletic backgrounds. With a simple goal of helping people understand how their body uses energy each day.

The Lumen device is built around breath tracking. You breathe into it, and it works with an app to guide your daily food choices. The brand also says the system is based on real research and tested methods.

Lumen is sold mainly on its official website. The company offers free shipping in the USA on qualifying orders, a 1-year warranty on every device, and a 30-day return policy, giving users time to try it and see if it fits their routine.

You can BUY it directly from the Official Website

How Does Lumen Work?

Lumen is made to help you understand your metabolism in a simple way. The Lumen device checks your breath to show if your body is burning fat or carbs.

So, how does Lumen work?

You breathe into the device, and it measures the CO? in your breath. More CO? may mean your body is using carbs, while less may mean it’s using fat. The app then gives simple daily guidance on what to eat and when.

We found a study published in the Journal of the International Society of Sports Nutrition showing that higher CO? levels followed higher carbohydrate intake. This may support how Lumen reads fuel use from your breath [1].

In simple terms, Lumen reads your breath and gives you daily direction. The goal is better food choices, steady energy, and improved metabolism over time.

Key Components in Lumen

Lumen isn’t a supplement, so there are no ingredients here. It works with built-in parts. These components read your breath and help guide your daily choices.

Breath CO? Measurement

Lumen uses breath CO? measurement to check how your body uses energy. You breathe into it, and it shows if you’re burning fat or carbs. We looked into it, and this method may help guide daily food choices.

We found research in the Interactive Journal of Medical Research showing Lumen could track fuel use compared to lab tests. It works well, but results may depend on using it right each day [2].

Flow Meter

The flow meter tracks how you breathe into Lumen. It checks the speed and pattern of your breath. We looked at this, and it may help the device read your metabolism more accurately.

We found research in the Journal of Sensors showing flow meters can measure exhalation rate. This may support more consistent and reliable readings, especially when breathing is done properly [3].

Flow Channel

The flow channel guides your breath through Lumen. It helps the air move in the right path, so the device can read your breath more clearly. We looked at this, and it may support smoother breath testing.

We found research in Sensors (Basel) showing that CO? sensor readings can depend on gas flow. This means a clear airflow path may help support more reliable breath results [4].

Lumen App Guidance

The Lumen app gives simple food guidance after each breath test. It helps you know what to eat and when. We looked at this feature, and it may make weight goals feel easier to follow.

A study published in Nutrients found that a mobile nutrition tracker helped support short-term weight loss with guided diet changes. This may support Lumen’s app-based food guidance [5].

You can BUY it directly from the Official Website

How to Use Lumen?

Using Lumen is simple.

  • Breathe into the device as guided on the screen.
  • Do this in the morning, before eating or drinking.
  • Check your result on the app right after.
  • Follow the daily food guidance given in the app.

Try to use it at the same time each day. Stay consistent for better results over time.

Benefits of Lumen

Lumen is made to help you understand your metabolism and make better food choices. We looked at it closely, and here are the main things it may help with.

  • Tracks Fat and Carb Use
    Lumen may help show if your body is burning fat or carbs in real time. This can make your metabolism easier to understand and help you make better daily choices.
  • Supports Better Food Choices
    It may guide you on what to eat and when to eat it. This can make meal planning simpler and reduce confusion around food decisions during the day.
  • May Support Weight Goals
    Lumen may support weight management through daily guidance and tracking. With consistent use, it can help you stay on track and build better eating habits over time..
  • Helps You Understand Energy
    It may show how your body responds to different foods and habits. This can help you manage your energy levels better and avoid sudden drops during the day.
  • Supports Daily Habit Building
    Lumen gives simple daily steps through the app. Over time, this may help you build better routines and stay consistent with healthier lifestyle choices.

Safety of Lumen

Lumen is made for daily use to help track your metabolism. So, is Lumen safe?

From what we saw, Lumen is a breath-based device. You simply breathe into it, and it reads your breath. You don’t take anything into your body, so there are no added substances like pills or supplements.

That makes it feel simple and low-risk for most people. It’s just measuring your breath, nothing more. Still, you need to follow the app instructions and breathe the right way to get accurate results.

If you have breathing issues, asthma, or any health concern, it’s a good idea to talk to a healthcare professional first before using it regularly.

How Effective Is Lumen?

So, does Lumen really work?

We looked at how the Lumen device works and what the brand says. It focuses on breath testing, metabolism tracking, and daily food guidance. The idea is simple… understand what your body burns, then make better choices.

Some people may find it easier to choose meals. Others may understand their energy and weight goals better. It’s not the same for everyone though.

So, what do we think?

Lumen is built for daily tracking and guidance. It may help with metabolism awareness and food choices, but you’ll need to use it often. Results really depend on your habits and consistency.

How Much Does Lumen Cost?

Lumen is sold on the official website. Here’s how the pricing looks.

  • 30-Day Weight Loss Kickstarter Plan costs $199.99. It comes with a 1-month premium subscription for 1 user.
  • 12-Month Weight Loss Transformation costs $319.99. It comes with 12 months premium subscription for 1 user.
  • 2 User – 12-Month Weight Loss Transformation costs $369.99. It comes with 12 months premium subscription for 2 users.

So yeah, the longer plan gives more support for the price. There’s also complimentary shipping for all packages and a 1-year warranty, based on the official website.

Lumen Customer Reviews

Many people who used Lumen shared positive experiences. Most say it helped them understand their metabolism better and make smarter food choices over time. Here’s what some verified users had to say:

This product really delivers. I understand my own body better than I ever have. The LUMEN makes tracking my metabolism and macros effortless, and healthy weight loss has never been easier. It only took about two weeks of tracking to get a sense of when my body was in ketosis. The weight just starts melting away. I recommend this product to everyone now! -EJ

I’ve been faithfully using my Lumen for 3.5 years. It has helped me see what my metabolism really is doing, and what triggers I may have. I see that stress, athletics, and exercise plays a huge role in my readings, as does medication. Their education is outstanding, and the discussion on mitochondrial health is very helpful for longevity, and cellular understanding. I give this device a 10/10! -Sharon B.

You can BUY it directly from the Official Website

FAQs

Q: Where can I buy Lumen?

A: Lumen is available on the official website. Buying there helps you get the real device, full access to the app, and available plans or offers.

Q: How fast does Lumen show results?

A: Lumen results can show early changes in a few days. Better understanding and weight progress may take weeks, especially if you stay consistent with daily use.

Q: Does Lumen have side effects?

A: Lumen does not have typical side effects since it’s a device. Some users may need time to get used to the breathing pattern and daily routine.

Q: Can beginners use Lumen easily?

A: Yes, Lumen is made for beginners and daily users. The app gives simple steps, so you don’t need special knowledge to start using it.

Q: Do you need a subscription for Lumen?

A: Yes, Lumen comes with plans that include app guidance. The subscription gives you daily food advice, tracking, and full access to your metabolism data.

Q: What makes Lumen different from other weight tools?

A: Lumen focuses on your metabolism using breath data. It gives real-time guidance instead of guessing, which may help you make better food choices each day.

Lumen Review – Conclusion

So, where does this Lumen review leave us?

Based on everything we have looked at, Lumen is a small device made to help you understand your metabolism, guide your food choices, and support your weight goals. And since you just breathe into it and use the app, it stays simple to use each day.

We see that many people who use Lumen say they understand their body better. Some also mention improved food choices and more control over their routine, especially with consistent use.

One thing we liked is the guided plans that come with the device. They help take away the guesswork and give you a clear path to follow.

All these reasons are why we consider Lumen a helpful option for people who want better insight into their metabolism and more control over their daily habits.

Where To Find It?

You can BUY it directly from the Official Website

Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Consumer Health Digest. We do not verify or endorse any claims made in these reviews. Please read the full product reviews disclaimer. *All individuals are unique. Your results can and will vary.

0
Customer Reviews for Lumen

Lumen Metabolism Tracker Review: Smart Health Tool or Gimmick?

Customer Reviews & Ratings

1 out of 5

Review this Product

Leave a review and share your experience with others.

Write a Review

Write a Review

Your email address will not be published. Required fields are marked *

5000 characters remaining.

Explanation ?

Privacy Policy

Submitting this review means that you agree to our Review Guidelines, confirming that you are a verified customer who has purchased the product and may have used the merchandise or experienced the service, and providing only a real interaction and experience without ulterior motives or has an affiliate or business with the company in any way. By ticking this box and submitting this review, you also accept that submitting fake reviews is a violation of Consumer Health Digest’s Terms of Use and such conduct will not be tolerated.

X

How to Upload your Proof of Purchase:

Please follow the instructions listed below to upload your electronic proof of purchase.

  • To upload your physical paper receipt, simply take a picture of it with your camera or phone. You may also try taking a still picture of it with your computer’s webcam.
  • Once you have taken the picture, save the image as a JPG, TIF, or PDF file.
  • Please note that you cannot upload a file that is larger than 2MB.
  • Then all you have to do is click the Browse button and search for your receipt picture file. You can also drag and drop the file into the provided field.

If you are still not able to upload your proof of purchase, please contact us for further assistance (take a moment to look over the sample bill below).

proofimg

Have a Question? Please Tell Us What We Are Missing Here!

Note: Consumer Health Digest isn't a healthcare provider. We can't respond to health questions or give you medical advice.
Your Privacy is important to us.
PRODUCT NAME
Lumen
PRODUCT BRAND
Lumen
PRICE (in USD)
$199.99
ITEM FORM
Device

Upload Your Video Review

    Privacy Policy

    Submitting this review means that you agree to our Review Guidelines, confirming that you are a verified customer who has purchased the product and may have used the merchandise or experienced the service, and providing only a real interaction and experience without ulterior motives or has an affiliate or business with the company in any way. By ticking this box and submitting this review, you also accept that submitting fake reviews is a violation of Consumer Health Digest’s Terms of Use and such conduct will not be tolerated.

    How to record video?

    • Prepare your device, ensuring it's charged and has enough storage.
    • Find a quiet, well-lit space with natural or good indoor lighting.
    • Position your device and frame yourself in the center with head and shoulders visible.
    • Introduce yourself, the product, and why you chose it.
    • Share your experience, including positives, negatives, and recommendations.
    • Test audio and video to ensure they're working properly.
    • Keep the video concise, aiming for 1-3 minutes.
    • Review your recording for quality and clarity.
    • Upload your video.
    Note: Video should be recorded in single take only (without any cuts)

    Video recording details:

    • Video duration: 1 - 3 minutes
    • Video Quality: Full HD (1080p and above)
    • Video format: MP4
    • Audio Quality: Clear without background noise

    5 Sources

    We review published medical research in respected scientific journals to arrive at our conclusions about a product or health topic. This ensures the highest standard of scientific accuracy.

    [1] The efficacy of a home-use metabolic device (Lumen) in response to a short-term low and high carbohydrate diet in healthy volunteers: https://pmc.ncbi.nlm.nih.gov/articles/PMC9987730/
    [2] A Handheld Metabolic Device (Lumen) to Measure Fuel Utilization in Healthy Young Adults: Device Validation Study:https://pubmed.ncbi.nlm.nih.gov/33870899/
    [3] Evaluation of a Thermal-Based Flow Meter for Assessment of Mobile Resting Metabolic Rate Measures: https://www.researchgate.net/publication/328181509_Evaluation_of_a_Thermal-Based_Flow_Meter_for_Assessment_of_Mobile_Resting_Metabolic_Rate_Measures
    [4] Carbon Dioxide Sensing—Biomedical Applications to Human Subjects:https://pmc.ncbi.nlm.nih.gov/articles/PMC8749784/
    [5] A Mobile-Based Nutrition Tracker App Enhanced Dietitian-Guided 2:1:1 Diet-Induced Weight Loss: An 8-Week Retrospective Cohort Study in Taiwan: https://pubmed.ncbi.nlm.nih.gov/39064777/
    email img
    1. About Us
    2. Editorial Policy
    3. DMCA Policy

    Note: Results may vary about any product effectiveness. The information contained in this website is provided for general informational purposes only. No medical claims are implied in this content, and the information herein is not intended be used for self-diagnosis or self-treatment of any condition.

    3 E Evergreen Road, Suite 101, New City, NY 10956, United States
    staff@consumerhealthdigest.com
    USA/Canada Toll Free: 1 (866) 884-2527

    Disclaimer: The information provided on this site is intended for your general knowledge only and is not a substitute for professional medical advice or treatment for specific medical conditions. You should not use this information to diagnose or treat a health problem or disease without consulting with a qualified healthcare provider. Please consult your healthcare provider with any questions or concerns you may have regarding your condition. Your use of this website indicates your agreement to this websites published terms of use and all site policies. Please see our Medical Disclaimer for more information.

    Any use of this site constitutes your agreement to the Terms of Use and Privacy Policy mentioned here.

    Do Not Sell My Personal Information

    Helping the Cause

    Make a Donation

    Follow Us

    google-preferred-source

    Ensure you see our latest reviews in Google Top Stories — add Consumer Health Digest as a Preferred Source with one click.

    X

    Advertising Disclosure

    The content that appears on this page is presented as an overview vs. comparative marketing. The provided information includes product information, overviews, buying guides, and product specifications. All trademarks, registered trademarks and service-marks mentioned on this site are the property of their respective owners. If something is factually inaccurate please contact us and let us know. By contributing your product facts helps to better serve our readers and the accuracy of the content.

    The table below does not include all companies or all available products in the market but those that we promote as their affiliates. In full compliance with the FTC guidelines, please assume that any and all links on the table are affiliate links, and we may receive compensation if you click one of these and make a purchase. We are independently owned and the opinions expressed here are our own. All editorial content is written without prejudice or bias, regardless of sponsor or affiliate associations. Read more about our process.
    X