Lumen Metabolism Tracker Device – Measure Real-Time Fat & Carb Burn, Daily Nutrition, Meal Plans, Metabolic Health, Weight Loss, Athletic Fitness & Performance for Men & Women w/Month Subscription
$249.00
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KNOW IF YOU’RE BURNING FAT OR CARBS—IN SECONDS: Track your metabolism in real-time with a single breath using the Lumen Metabolism Tracker Device. Instantly see how your body responds to food, sleep, and workouts—and use that feedback to lose weight, boost energy, and become metabolically flexible. No more guessing—just daily, personalized data for smarter health decisions.
BUILT AROUND YOU, DESIGNED FOR RESULTS: Lumen is for anyone stuck in a weight loss rut, feeling drained, or just wanting to understand their body better. Whether you’re juggling work, hormones, or training goals, Lumen’s data helps you personalize your macros, improve performance, and support fat burn, so you’re synced to your body’s rhythms and can achieve your goals in a way that fits real life.
CLINICALLY VALIDATED & EXPERT BACKED: Lumen is grounded in science and validated in peer-reviewed studies. Used in health clinics, gyms, and trusted by professionals to help people improve metabolic health through real-time breath analysis and personalized lifestyle guidance. With one app, monitor progress, optimize results, and unlock the data your body’s been trying to tell you all along.
SMART TOOLS TO TRACK WHAT REALLY MATTERS: Use personalized nutrition plans, AI-powered meal suggestions, and a fasting tracker to pinpoint your fasting sweet spot and avoid muscle breakdown. Turn carbs into fuel to reach peak fat burn and learn how to eat in sync with your hormones. With 50+ integrations across your favorite apps, track progress and personalize your journey with deeper insights.
WHAT’S IN THE BOX: Lumen device, USB-C charging dock and cable, travel case, and access to the Lumen app. Your 3-month subscription unlocks all premium features, personalized coaching, and access to our exclusive in-app community for real-time support and lasting results. Battery life up to 10 days. iOS and Android compatible. One-year limited warranty. Smartphone not included.
Albert Jia –
Potential game changer for Respiratory Quotient measurement and understanding your metabolism
Lumen is a very interesting device and may be revolutionary for the field of exercise physiology. While measuring respiratory quotient and seeing if you are burning carbs or fats used to require a full face mask to capture exhaled air, lumen does that without all the hassle and discomfort! It is always interesting to see what my body is burning and comparing when I am fasted or fed for insights on what I am fueling myself with.I like that it autosyncs with my health app and I don’t need to enter any metrics manually and also the food that I track feeds in as well. It has a built in personalized nutrition coach that provides insights on what you should be eating macronutrient-wise based on the readings from your daily breaths.Speaking of daily breaths, you’re supposed to do one before bed and one after waking and 10 days later it will give you a better picture of your metabolism. The breathing is a little tricky to get right at first but once you get the hang of it becomes a fun little mini-game. The battery life is great as well; I haven’t had to charge it since initially charging it.
Lauren M –
Great device for health data junkies
You’ll enjoy using this if you’re someone who’s obsessed with collecting health data like steps, activity, food tracking etc. It integrates with your Apple Health metrics and whatever wearable you use. Also pulls data from your food logging to get real time nutrition updates.You breathe into the device when you wake up, after each meal, and before you sleep. (Sometimes I only do wake time and bed time when I’m busy but you can set notifications as reminders). It tells you what % of carbs and fats you’re burning. You’ll expect to be burning more carbs right after a meal especially if it was higher in carbs but you should ideally see a trend towards more fat burn after you’ve been fasting for some time to indicate metabolic flexibility. After 10 days of collecting breath data it can give you a personalized nutrition plan tailored to your goals.Learning how to breathe into the device is difficult at first but there’s a beginner tutorial and a helpful ring visual on the screen to help you get the right duration and intensity of your inhale/exhale.Also super impressed with the battery life, have not had to charge it for over a week!
john a. armstrong –
Inaccurate results & poor customer service
The results are inaccurate and inconsistent with more reliable RMR testing. I have been trying to cancel my membership but I keep getting stonewalled and prohibited by lumen to cancel.
Tom Delleree –
Great weight loss plan
Still learning how to navigate. Difficulty being able to enter in/ add food intake.
Sam –
Expensive
Don’t think the technology is there yet to be accurate enough to trust
Cindy Kim –
Game changer for understanding my metabolism
I have been using the Lumen Metabolism Tracker for the past week and I honestly love it. The device is sleek, easy to carry in the travel case, and charges quickly with USB C. The app is simple to use and makes it easy to track my breath readings, food, workouts, and sleep all in one place.The most eye opening part is seeing in real time whether I am burning carbs or fat. As someone who lifts and does cardio, it has been motivating to adjust my carb timing, and I have noticed better energy during workouts and steadier recovery. It feels like having a personal coach with me every day.You do need to be consistent with breath tests and logging, but I like the structure because it keeps me accountable and more mindful about what I eat. The subscription is worth it for me because the insights are personalized and have pushed me to make smarter choices with my nutrition.If you are serious about your health and fitness goals, Lumen is an amazing tool. It is not just another gadget. It has helped me truly understand how my body works day to day. Total five stars from me.
Tamar Brestovisky –
cracking the code on my metabolism
I was skeptical, given the price and subscription, but Lumen genuinely works as a personalized guide. It’s not a magic weight-loss bullet—you still have to put in the effort—but the data is incredible. Seeing in real-time if I’m burning fats or carbs, especially in the morning, has completely changed how I time my meals and workouts. My energy is way more consistent, and I’m slowly but surely improving my metabolic flexibility. The breathing technique takes a little getting used to, but it quickly becomes a simple, vital part of my morning routine. Highly recommended if you’re serious about biohacking your nutrition.