Lumen is a new product that measures your metabolism in real time. It provides personalized nutrition plans to master your weight loss and performance goals.
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Is Lumen Inc legit?
Lumen Inc (www.lumen.me) has a 4.2 out of 5 rating on OK.one, based on 175 user reviews collected here. It is listed under Beauty & Well-being and its reputation is good. 79% of reviews are 4 stars or higher and 14% are 1 star; The business has replied to 100% of negative reviews; Reviews mostly discuss Product, User experience, App. Last updated 2026-09-05.
What reviewers say
AI generated
Reviewers overwhelmingly had a great experience with this company. Customers praise the device for making it easy to track metabolism, monitor fat and carb burn, and stay motivated on their wellness journey. Reviewers frequently mention that the app and daily breath measurements provide insightful guidance for improving nutrition and supporting overall health.
However, some people mentioned difficulties with the app, noting that barcode scanning for meals can be limited and custom recipes are hard to enter correctly. A few other people also felt that customer support could sometimes be difficult to reach or slow to resolve technical and account issues.
Auto-generated from all reviews of this business. For reference only.
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 mitochondria health is very helpful for longevity, and cellular understanding.
I give this device a 10/10!
Reply from Lumen Inc2025-12-26
Hi Sharon,
Thank you for the 5-star review!
We’re so happy to hear that you’ve been using your Lumen for 3.5 years and that it’s helped you better understand your metabolism. That kind of long-term insight is exactly what we hope Lumen can provide. Keep up the awesome work :)
All the best,
The Lumen Team
Simply the worst. Devices and consistent.
Customer support is the worst can’t get a hold of anybody do not answer their phones
Wouldn’t buy this unit or deal with this company ever again you should make it easier for your customers to contact you not make it impossible
Reply from Lumen Inc2025-12-26
Hi Craig,
Thank you for the review, and we do apologize for this experience.
At this time, all customer support is handled through email and our in-app support chat.
Unfortunately, we cannot locate your contact details using the information provided on TrustPilot. We have submitted a request for your information and look forward to speaking with you. Our Customer Experience team is committed to assisting you and ensuring your concerns are addressed.
Feel free to also contact us at [email protected] or via the in-app chat, and our team will be happy to assist.
All the best,
The Lumen Team
difficult set up for app and device. sent it back intact and now waiting a month for refund. do not buy from these people
Reply from Lumen Inc2025-12-23
Hi John,
Thank you for your feedback. We're sorry to hear you were not satisfied with your Lumen. If you sent back an authorized return, our team should be able to help get that taken care of for you if it has been over a month. Please reach out to us directly at [email protected] so we can further assist.
All the best,
The Lumen Team
The app support for Lumen is awesome. I love being able to gauge what my body is using for fuel, and therefore, what it needs. More importantly, I now have the tools available to see fairly immediately how my body is responding to what I recently ate. There is no more “just stay on a low carb diet and increase exercise” as professional advice for weight loss. This tool helps identify the solid steps that someone can take to facilitate weight loss. Actionable steps with observable results.
Reply from Lumen Inc2025-12-21
Hi Leonard,
Thank you for the 5-star review!
We’re so happy to hear that you’re finding real value in the app and using Lumen to better understand how your body fuels itself and responds to food. It’s great to know the insights are helping you take clear, actionable steps toward your goals. Keep up the great work 🙂
All the best,
The Lumen Team
This is a terrible device. It’s very difficult to use. The breathing technique necessary makes it very difficult to get a measurement, I usually have to try at least 5x before it measures and if you fail the 6th measurement then you have to wait an hour. TBH if I have to wait an hour I’m not going to use it again that day. I hate that I purchased this. In 10 days I’ve only been able to get 3 reads.
Reply from Lumen Inc2025-12-19
Hi Carmen,
Thank you for taking the time to leave a review and share your feedback with us. We’re truly sorry to hear about your experience and appreciate you bringing this to our attention.
We’re more than happy to assist you with the breathing maneuver and have reached out to you via email. Please feel free to reply there or contact us through the in-app chat at your convenience.
We’re glad we were able to resolve this for you and are always here if you need further support.
All the best,
The Lumen Team
Opaque subscription billing and unclear practical value
I stopped using the Lumen device because I did not find the data meaningfully actionable. While it generates readings, it was unclear how to modify behavior based on those readings in a way that felt worthwhile or clearly connected to outcomes. That lack of practical decision-support is why I discontinued use.
After deleting the app, I confirmed there was no active subscription visible in my Apple account. I also could not find a clear account portal or subscription management page on Lumen’s website.
I later discovered recurring subscription charges that were not accompanied by billing emails, receipts, or renewal notices. The only way to become aware of the subscription was by noticing charges on my credit card statement. When I contacted Lumen, they declined to refund past charges despite these circumstances.
I would encourage potential customers to carefully evaluate both whether the data meaningfully informs behavior change for them and how subscription billing and cancellation are handled before purchasing.
Reply from Lumen Inc2025-12-17
Hi Shannon,
Thank you for the review.
Memberships may be canceled at any time. Cancellation becomes effective in the subsequent billing cycle, in accordance with our FAQ, Checkout disclosures, and Terms of Use.
We’d be glad to help clarify or review your membership. Please contact us at [email protected] or via the in-app chat, and our team will be happy to assist.
All the best,
The Lumen Team
it's totally useless. if I'm moving around, it shows I'm using carbs. if I'm relaxing watching a show, it's on 3 - mixed carb/fat. the only time it went lower was right after I brushed my teeth.
Reply from Lumen Inc2025-12-15
Hi Ana,
Thanks for sharing your feedback with us!
When taking a measurement, it's recommended that it be done in a relaxed state. Lumen measures your CO2 to determine whether your body is burning fats or carbs. Therefore, when you are moving around, your body creates excess CO2, which skews the results.
For additional support, please feel free to reach out to [email protected] or via our in-app chat, and the team will be happy to assist you.
All the best,
The Lumen Team
Do NOT BUY!!!! Terrible greedy unresponsive company. Just got mine less than a week ago. App is stuck on screen asking for credit card information even though the membership is not expiring for some time. Help (contact) does NOT respond! I have screen shots. Also, you do have to open the package to know it works. However if product does not work, you cannot return it since you opened the package. WHAT A SCAM!!! Everyone affected should be looking into a remedy for this situation. I sure will be. In other word... Not guaranteed at all. Buy at your own risk!
Reply from Lumen Inc2025-12-15
Hi there,
Thank you for reaching out and sharing your feedback. We sincerely apologize for the inconvenience.
Unfortunately, we were unable to verify your details through this review and have requested your information. Please share this at your earliest convenience, and our team will be in touch to assist you.
All the best,
The Lumen Team
I’m in my second week of usage, and find that I’m learning so much from the plan about how my body works as I go along that even if my goal of weight loss is not what I hope for, I will continue to use it to monitor my health.
Reply from Lumen Inc2025-12-12
Hi Karen,
Thank you for the awesome review!
We're so happy to hear that you are gaining valuable insights from Lumen. Even beyond weight loss, many users find that Lumen helps them stay on track, make healthier choices, and track their overall metabolic health.
If you ever have questions, please do not hesitate to reach out to our support team via our in-app chat!
All the best,
The Lumen Team
I am a newbie but already learning so much and support is amazing.
Reply from Lumen Inc2025-12-10
Hi Virginia,
Thank you for the 5-star review!
We’re thrilled to hear that you're loving your Lumen journey. Keep up the great work :)
All the best,
The Lumen Team
Lumen is amazing at showing you how different foods affect your metabolism. This allows you to experiment with different food choices until you see which ones help you stay in a fat burning state the longest.
I am grateful I purchased it and recommend it 100%
Reply from Lumen Inc2025-12-10
Hi Xavier,
Thank you for the 5-star review!
We're so happy to hear that you are gaining valuable insights from Lumen.:) Keep up the great work!
All the best,
The Lumen Team
Using the Lumen has really helped me understand how my body is utilizing food and what happens when I fast. I like the meal suggestions and overall information available.
Reply from Lumen Inc2025-12-08
Hi Kim,
Thank you for the 5-star review!
We're so happy to hear that you are gaining valuable insights from Lumen. Keep up the great work :)
All the best,
The Lumen Team
This product really delivers. I understand my own body better now than I ever have. The LUMEN makes tracking my metabolism and macros effortless, and healthy weightloss 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!
Reply from Lumen Inc2025-12-08
Hi E J,
Thank you for your awesome review!
We’re so glad to hear that you're understanding your metabolic health with your Lumen. Keep up the great work :)
All the best,
The Lumen Team
Very helpful with understanding my body.
I’ve been able to lose a noticeable amount of weight in a short amount of time.
Reply from Lumen Inc2025-12-08
Hi there,
Thank you for the 5-star review!
We're so happy to hear that you are gaining valuable insights from Lumen, and congrats on the weight loss thus far :) Keep it up!
All the best,
The Lumen Team
The knowledge it gives on metabolism is priceless.
Reply from Lumen Inc2025-12-05
Hi there,
Thank you for the 5-star review!
We're so happy to hear that you are gaining valuable insights from Lumen. Keep up the great work :)
All the best,
The Lumen Team
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