Lumen Reviews

Hack your metabolism | Lumen

lumen.me
3.56
140 reviews
Great Rating
Based on 140 user experiences

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Rated 3.56 out of 5 by 140 Happy Customers

42.9%
14.3%
13.6%
14.3%
14.3%
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AI Review Summary Based on 139 reviews

Lumen users report that the device provides valuable metabolic insights and helps with accountability in understanding fat versus carb burning. Many appreciate the ease of use, customer support, and the potential for healthier lifestyle changes. However, a significant number of reviews highlight issues such as inaccurate readings, high subscription costs, restrictive access without membership, and poor device functionality. There is also mixed feedback regarding the effectiveness of the device for weight loss and usability over time.

What customers love
  • Insightful metabolic data
  • Easy to use
  • Helpful customer support
  • Accountability tracking
  • Educational content
Common concerns
  • Inaccurate readings
  • Expensive membership
  • Device malfunctions
  • Limited food tracking
  • Confusing setup

Last updated 1 month ago

T

Not worth it

The Lumen is a very expensive subscription I ve had the device for two weeks and I ve learned zero insights from taking multiple readings a day If the point is to tell me that I should eat no carbs mission accomplished I didn t need a 100 month device to tell me that
C

Exciting concept poor execution

I was excited about a device that would help me push past the plateaus of a big weight loss I saw this product backed by Dr Fung a clinician that turned me on to the science of weight loss Well my excitement waned when I purchased the device and downloaded the app As I understand it the device basically measures CO2 which somehow correlated with fat or carb burning After 2 blows the device failed I work with airway gases in my job so imagine my frustration at the chat experts and tutorials that repeated told me that I was not inhaling through the device properly I was repeatedly gaslighted by the app and by the support Also the App is also not robust I purchased a brand new unit and it repeated told me to upgrade the device That failed as well The app does not pair with other weight loss apps such as My fitness pal or Apple health Read Jason Fungs books and forget this nonsense This company launched this product too early without working out the kinks I sent it back today
N

Defective will return it but have to bear the postage myself

I received the Lumen device but can t get it to work It appears to be defective They make it difficult to figure out how to return it And even though I received a device that does not work it appears that they expect me to pay to return it Update Lumen sent a representative to pick up the device at their expense and will refund my money
C

I didn t really feel like I was getting

I didn t really feel like I was getting any value out of the product This coupled with a hidden subscription cost that they make difficult to cancel outside of talking to a support rep is a huge turn off Won t be going back to use it again just for this reason They make it seem like it s easy to do so via the app by going to a subscription under settings that is nonexistent and only accessible via the special link in the FAQ It s a scummy method
G

Lots of expectations high price no results

Lots of expectations highly expensive no results In a nutshell a nice idea apparently supported by scientific evidence which did not work at all in my case Over almost one year of use I got kilos instead of losing I got apparently random measures of my metabolism for sure I got no results I do not honestly recommend this device also because of its unexplicably high price
S

Nothing makes any sense

I have been following the program for 2 months my metabolic flexibility score has gone down since I started it is supposed to go up and I have not lost any weight I just had a week with good numbers almost every morning and gained 3 lbs There seems to be no relationship between doing the right things getting good numbers and losing any weight I have gained no insight so far from using this program
R

Monthly Fees Right Away 19 Every Month

The device seems to work well enough telling me how I m burning carbs and fat Always stayed within a 45 55 or 55 45 range no matter what I did Then yesterday one month after I bought it I was charged 19 for monthly service to the privilege of using my device You d think you d at least get a few months included with the price to get the device Now I have a paperweight on a charger stand that I can t use if I don t fork over 19 each month Of course I was charged the 19 after my 30 day trial had just expired Disappointed
F

Cannot use unless you pay monthly in addition to the price of the device

I have been paying monthly for Lumen but I don t use most app features like meal planning and logging and I only use the app to see my measurement So when I cancelled my monthly membership I cannot use Lumen at all unless I pay a monthly fee So it s essentially a 200 piece of plastic I am shocked I cannot use such an expensive device unless I keep paying The pricing is very deceptive I wish this was stated at the time of purchase I wouldn t have bought it Little to no value If you want to lose weight just track your calories That s it
K

Beware of the 420 yearly renewal or they brick your device

The product itself isn t bad and I can see its potential as a useful tool for tracking eating habits as long as one keeps up with the constant measurements However my significant concern revolves around their subscription renewals which they seem to keep shrouded in secrecy I made the initial purchase of the device a year ago and have gone through periods of using it To my surprise the other day I received an email requesting an update of my credit card details What bothered me was the complete absence of prior emails containing renewal information or pricing details It seemed as though they were attempting to quietly deduct money from my card without any prior notice I decided to reach out to them via email inquiring about the renewal cost and the reason for the complete lack of information about it on their website Unfortunately the response I received was rather curt stating that my account had been canceled To my frustration it appears that the only way to discover the pricing details is by clicking on the renew now button revealing a steep cost of 35 per month or a whopping 420 per year This lack of transparency in their renewal process has left me thoroughly dissatisfied with their service especially since I now have a device that s completely useless unless I fork out 420
N

Just eat your greens and live in moderation

I took out a one year subscription The device gave up the ghost after about nine months and by then I had seen enough and did not bother to get a new one I am quite willing to believe that the device itself gives accurate readings However this information is only of limited added value as - as is often stressed in the in-app talks by the very earnest and ber fit looking coaches who clearly started their fitness regime way before anyone had ever thought of Lumen human metabolic processes are highly complex and therefore identical patterns of behaviour food intake rest stress etc may still result in different outcomes This was certainly my experience at times the results made very little sense and were inconsistent with results under similar conditions Which ultimately means that you do not truly hack your metabolism you simply get some insight in what your body does at any given moment - irrespective of the readings of the Lumen device the main message is what my mother and her mother before that used to say eat your greens lots of it and make certain you get enough protein Beyond that get enough sleep don t stress out and if you want to lose weight take in less calories than you burn And take it easy on the alcohol If you stick to this you do not need Lumen to tell you what your body does I am sure that the Lumen device is a clever little thing that makes available information that until a few years ago required professional and difficult to access equipment More clever than the device itself however is the sales pitch around it which would have you believe that the information the device provides is important for your well being However unless you are a professional athlete maybe it isn t Just eat your greens and avoid extremes And also without Lumen you will live happily ever after

About Lumen

The world’s first portable device to measure track and analyze your metabolism. See if your body is using fats or carbs for fuel in a single breath.

United States

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Frequently Asked Questions

Lumen is a personalized metabolic health platform. It consists of a handheld breath analysis device and a mobile application designed to measure your metabolism in real-time. By analyzing the carbon dioxide (CO2) concentration in your breath, Lumen determines whether your body is primarily burning carbohydrates or fats for energy. This data provides personalized insights and actionable guidance for nutrition, fitness, and overall wellness, helping you optimize your metabolic health.

The Lumen device is a portable breathalyzer. Users breathe into the device, typically each morning and at key moments throughout the day. It measures the concentration of CO2 in a single exhalation. This measurement indicates your body's current primary fuel source—carbohydrates or fats. This state is known as metabolic flexibility. The result is instantly synced to the Lumen mobile app, which interprets the data to provide a personalized metabolic snapshot and daily recommendations.

The Lumen app serves as the central hub for the user experience. Key features include a Daily Metabolism Score indicating your metabolic flexibility; Customized Nutrition Plans with meal and macronutrient guidance tailored to your goals; Fitness Optimization insights for pre- and post-workout nutrition; Sleep and Metabolism Tracking to analyze the impact of rest on your metabolic rate; and access to Educational Content with science-backed information on metabolism, nutrition, and habit formation.

Lumen is designed for health-conscious individuals, athletes, and anyone seeking a deeper, data-driven understanding of their body's metabolism. It is particularly relevant for those interested in personalized nutrition, biohacking, metabolic flexibility, and moving beyond generic diet plans. Users typically aim for goals such as weight management, improved energy levels, enhanced athletic performance, and overall metabolic health optimization.

Metabolic flexibility refers to the body's ability to efficiently switch between burning carbohydrates and fats for fuel based on availability and demand. Lumen measures this state to provide your daily metabolism score. Achieving metabolic flexibility is associated with benefits such as more stable energy levels, efficient fat burning, improved insulin sensitivity, and better overall metabolic health. The Lumen platform provides personalized guidance to help users develop and maintain this flexibility.

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About Lumen

Lumen: A Personalized Metabolic Health Platform

Lumen.me is the official website for Lumen, a company dedicated to empowering individuals to optimize their metabolic health through personalized, data-driven insights. The platform centers around a unique handheld device and accompanying mobile application that measures metabolism in real-time, offering users a scientific approach to nutrition, fitness, and overall wellness.

Core Technology and Function

The foundation of the Lumen ecosystem is a compact, portable breathalyzer device. Users simply breathe into the device each morning and at key moments throughout the day. By analyzing the concentration of carbon dioxide (CO2) in a single breath, Lumen can determine whether the body is primarily burning carbohydrates or fats for fuel—a state known as metabolic flexibility. This immediate feedback provides a personalized metabolic snapshot, moving beyond generic calorie counts to understand how the body processes food.

The Lumen Experience and App Integration

The device seamlessly pairs with the Lumen mobile app, which serves as the central hub for the user experience. The app interprets the breath measurements and translates them into actionable guidance. Key features typically include:

  • Daily Metabolism Score:A personalized score indicating metabolic flexibility for the day.
  • Customized Nutrition Plans:Meal recommendations and macronutrient guidance tailored to help users reach their specific goals, whether for weight management, improved energy, or enhanced athletic performance.
  • Fitness Optimization:Insights on the best type of fuel (carbs vs. fats) for upcoming workouts and recommendations for post-exercise nutrition to improve recovery.
  • Sleep and Metabolism Tracking:Analysis of how sleep quality and duration impact metabolic rate and next-day fuel usage.
  • Educational Content:Access to science-backed information about metabolism, nutrition, and habit formation.

Target Audience and Benefits

Lumen is designed for health-conscious individuals, athletes, and anyone seeking a more nuanced understanding of their body's inner workings. It is particularly relevant for those interested in biohacking, personalized nutrition, and moving away from one-size-fits-all diet approaches. The proposed benefits promoted by the platform include achieving metabolic flexibility—where the body efficiently switches between fuel sources—leading to more stable energy levels, efficient fat burning, and improved overall metabolic health.

Company Vision and Scientific Backing

The Lumen website positions the company at the intersection of technology and preventive health. It emphasizes a commitment to scientific research, often highlighting studies conducted in partnership with academic institutions to validate its methodology. The overarching vision is to make advanced metabolic tracking accessible, providing users with a tool to make informed daily decisions that contribute to long-term health and well-being.

In summary, Lumen.me presents a comprehensive platform that combines a novel hardware device with sophisticated software. It aims to demystify metabolism by offering personalized, real-time data and actionable steps for nutrition and lifestyle, positioning itself as a proactive tool for anyone looking to take a scientific and personalized approach to their health and fitness journey.