Lumen - Metabolism Tracker - Black
Model: MF-V2-01
SKU: 6631051
This item is no longer available in new condition. See similar items below
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
I was a bit skeptical about the Lumen metabolism tracker device but after about 1 week of use I have found it to be a very useful and promising device for weight loss and/or weight management - I even lost a couple pounds during my first week of use. I love that the app determines your daily macro intake based on your breath measurements and provides suggested meal options as an added bonus. I don't know enough about the science of the Lumen device, but, for me, the breath measurements collected seemed accurate. Additionally, the real time data from the daily measurements boosted my motivation to put in the work each day to meet macro goals. (It was almost like a game to me.) Typically any adjustments to eating habits is tracked by weight loss which doesn't provide instant results to gauge your progress. The measurements taken with the Lumen device allows users to see how their body (metabolism) responds to various situations throughout the day, providing real time results, with a primary focus around meals, workouts, fasting, and your sleep. The device is very easy to use and the Lumen app, after some use, is simple to navigate as well. Another great feature of the app is that it allows for one to connect or sync many health tracking apps. Unfortunately Samsung is not one that can be linked, which is what I use, and that was very disappointing considering that it is a major brand. Most of my experience using the Lumen app went smoothly, but it was a bit buggy at times. There were several times that the search feature for logging meals would freeze and that often resulted in me having to restart the app. There were also a couple days that outages within Google seemed to really affect the functionality of the app too. The barcode scanner for logging meals was surprisingly quick and accurate, and I did try to utilize that often. I was also pleased with the amount of food items already included within the database as well. There are many features with the app that should satisfy most users’ needs. Between the numerous features and the personalized plans the membership fee seems very reasonable. Overall, I have been mostly impressed with the Lumen device and its app. For those looking to try something different, or for those who need more instantaneous progress feedback, the Lumen metabolism tracker just might be the missing piece in your health journey.
Posted by KMiller
A few years ago, I was diagnosed with Type-2 Diabetes. Fortunately, I’ve been able to manage it quite well by limiting sugar intake along with medications. Since I’ve gotten the A1C level in check, the next step in my health journey is to lose some weight. While the Lumen is not marketed as a weight loss device, my hope is that it will help me with carb awareness and help to encourage me towards better eating habits for the long term. The Lumen device is a very premium-looking piece of technology. It comes in an impressive black box and comes with its own charging stand and travel pouch. The app for Lumen is quite nice, too. Downloading it is the first step in setting it up. The app will guide you through the set up process and train you in how to measure your breath with the device. Lumen does require a subscription ($19/month or $180/year) for ongoing use, but it comes with one month free with the purchase. In a world that seems to have a subscription for nearly everything, I wasn’t surprised about this added expense, but it was disappointing. Since this is a health-tracking device, I would put it in a similar category to something like a gym membership, which requires a monthly fee, but I think it could be lowered quite a bit. As a means of comparison, I’m able to monitor my glucose and track it through an app without an recurring fee. I did have to purchase my glucose monitor, but the app came with no strings attached. So, while I accept there is an ongoing fee for this type of system, I think the cost could be lowered. Using it in practice is somewhat of a feat. First of all, you have to discipline yourself to use it the same time everyday. While having this sort of requirement is helpful for forming good habits, it’s still a hurdle to overcome. Second, the breath capturing process is a little different than I expected. You have to take a slow breath in, hold it for ten seconds, and then exhale slowly. This could be very difficult for some people who have breathing deficiencies. I found it a little difficult at first because the app guides you not to do it to fast or hard. It gives you an on-screen prompt and tells you to keep the ball inside a certain perimeter while you are completing your breathing exercise. It took me a couple of tries to get it just right. So, like I said, discipline is key with this device. For me, I was using Lumen as a supplemental device to help kick start weight loss and monitor my carb burning. I feel that it is helping by providing more information to me, but I question how accurate it is since you have to do the testing ‘just right’ every time you do it. Plus, I was expecting information that was more specific than simply burning fat or carbs. That said, I could see Lumen being very useful for people because the full benefit comes from committing to the daily routines and guidance, not just using the device. Pros: Easy to use Device feels premium App guides your habits Can help drive smarter decisions if you’re looking to optimize energy levels, fat burning, or diet timing. Cons: Requires discipline to make sure you are doing it the same time everyday at the right times for accuracy Device gives you a ‘rough estimate’ of fuel usage, but it’s not as precise as clinical testing (can’t replace that) Not a ‘magic bullet’ for weight loss - could confuse some people expecting that
Posted by nickcal
PROS: * Very nice quality * Robust app (so many links, videos, stats, and data) * syncs with other health services (i.e. Apple Fit, Fitbit, Garmin) * Easy to use * Comes with an included travel case CONS: * Another subscription service ($19/month or $180/year) * May not separate itself from other smart wearables enough for some If you've come across this product, you might be wondering what it does. I certainly was. According to Lumen, they've created this device to help people improve their metabolic flexibility, which can lead to better workouts, improved sleep, easier weight loss, and an overall happier, longer life. While this may or may not appeal to you, it certainly appeals to me. As a tech lover, I've found that as I age, it takes more effort to maintain my health (I wish it were the other way around). Sleep has always been a challenging aspect for me to manage consistently, so anything that can help me improve my routine is a welcome addition. So far, using the Lumen device has made me more aware of what I eat, how much I move throughout the day, and how I prepare for sleep. I own several health-monitoring devices, including a smartwatch that I wear nearly every day to track my workouts, stress levels, and sleep. Initially, I struggled to see the main differences between the Lumen and my smartwatch in terms of health monitoring. However, with the Lumen, you blow into the device, which provides more detailed information than just your heartbeat. It uses a CO₂ sensor and a flow meter to measure the CO₂ concentration in your breath, offering instant feedback on whether you're burning carbohydrates or fats for energy. This is something a smartwatch currently cannot do. Using the Lumen before workouts or after exercise can help you understand how your body burns fat. Additionally, it provides daily nutritional goals, which can be beneficial for those who struggle with dieting, as many d The presentation of the product is impressive. As soon as you open the box, you can see the quality and care that went into creating it. Priced at $199, it's reasonably priced, but considering its features, the cost may deter some potential buyers. After all, for a little more, you could purchase a nice smartwatch with various health features. On the other hand, the app is well-designed and far from basic. It offers numerous links and a wealth of information and articles to support your health journey, reflecting the careful thought put into the app, much like what you would expect from a membership service. However, this is where some people may lose interest. Yes, there is a subscription for the app and the data collected by the Lumen device. In 2025, many of us are overwhelmed by subscription services and hesitant to add more. I feel the same way. When you consider that a gym membership can cost around $20 a month, it's hard to understand why connecting to an app costs $20 a month (or $180 a year). As with everything, the costs add up. When you factor in the $20 monthly subscription along with the $200 for the device, it becomes quite an investment. However, if you get into it and use it daily, I can see its value. Fortunately, I may not need to stay on top of my health as much as others, so using it daily isn't something I find myself doing. Overall, I'm supportive of technology that helps people maintain their health, and Lumen is certainly doing that. While I may not invest in a membership, it's available for those who will find it helpful daily.
Posted by Bryan
Customers are delighted by the Metabolism Tracker's ease of use and sleek design. Users find the app simple to navigate after some use, and the breath measurements collected seem accurate. The device also boasts amazing battery life. Overall, customers seem to have a very positive experience with the Metabolism Tracker.