Lumen is the world’s first handheld device that lets you measure your metabolism in real time — using just your breath. With instant insights into whether you’re burning carbs or fat, Lumen helps you make smarter nutrition, fitness, and fasting decisions. Whether you're aiming to lose weight, boost energy, improve performance, or support hormone balance, Lumen acts as your personal metabolic health coach, offering tailored nutrition plans and expert coaching to reach your goals faster. Scientifically validated and built for everyday life, Lumen transforms how you understand and work with your body.

• Real-Time Metabolic Insights: Lumen is the world’s first handheld device that measures your metabolism through your breath, revealing in seconds whether you’re burning carbs or fats. Using a built-in CO₂ sensor and flow meter, it gives you personalized, real-time insights, so you can adjust nutrition, exercise, or fasting for more effective results.
• Lumen Membership: Enjoy your first month of Lumen membership free with your purchase — plus lifetime access to your metabolic breath results. After your free month, you may subscribe and continue to enjoy the full app experience according to a monthly plan of $19/month or our yearly plan of $180/year. This offer is available to new members only and can be canceled anytime.
• Track the Impact of Your Habits: By tracking how your metabolism responds to your nutrition, fitness, sleep, and stress levels, Lumen reveals how your lifestyle impacts your metabolic health and guides you toward optimal habits for your unique body.
• Unlock Key Benefits: As you start improving your metabolism, you’ll start to see the benefits. Manage your weight, boost fat burn, and reach your goals with more ease. Elevate your athletic performance, increase your energy, and enjoy sharper focus and mental clarity throughout the day. Plus, experience deeper, more restful sleep to help your body recover and perform at its best.
• Transform Your Weight Management Journey: Lumen's weight loss track guides you to adjust your lifestyle and your macros to optimize fat burn and accelerate fat loss.
• Daily Personalized Nutrition Plan: Each day, Lumen translates your breath into a personalized nutrition plan. It guides your carb, fat, and protein intake to match your metabolic state, goals, and lifestyle. Whether you're aiming for fat burn, energy, or recovery, your plan adapts in real time so you always know what and when to eat.
• Maximize Your Fitness Performance and Training Results: Fine-tune carb and fat utilization for peak performance. Take a breath measurement before and after your workouts to pinpoint fueling for training and optimal recovery. You will also receive nutritional recommendations for fueling up pre-workout and recovery for post-workout.
• Intermittent Fasting Game-Changer: Whether you’re new to fasting or experienced, Lumen lets you discover your optimal fasting and fat-burning window each day. You never have to guess again if your fast is effective or if you should break it to avoid muscle breakdown.
• Menopause Support and Guidance: Hormonal changes during menopause can challenge metabolism, weight management, fitness, and energy. Lumen offers personalized nutrition guidance to help you adapt and maintain balance throughout the transition.
• Sync Your Nutrition Around Your Menstrual Cycle: Track your menstrual cycle and gain insights into how to adjust your nutrition and lifestyle choices based on it, ensuring your metabolism is supported at every stage.
• AI-Powered Food Log: Log your meals in a single snap on your phone’s camera or via voice recording for tracking and accountability that fits into your busy life. Lumen uses AI to scan the macros in your meal so you can easily track and log your target macros for the day.
• Expert-Backed Guides and Videos: Gain access to and explore in-depth guides and videos in the Lumen app, which will help you learn more about how to optimize your nutrition, metabolism, and energy—all at your own pace.
• Cutting-Edge Health Technology: Lumen is the world’s first handheld metabolic health tracker, giving you lab-level insights in the palm of your hand, so you make smarter choices for your body’s needs.
• Award-Winning Science: Lumen was named a Time Best Invention and recognized for its innovation and scientific rigor by CNBC, CES, Men’s Fitness, and more. Lumen also partners with dozens of universities worldwide, contributing to groundbreaking metabolic research.
• Scientifically Validated: Lumen is scientifically validated in peer-reviewed studies to meet the gold standard for metabolic measurement, ensuring accurate and reliable metabolic insights.
• Long-lasting Battery for Daily Use: Lumen is powered by a rechargeable lithium polymer battery that can last up to 10 days on a single charge (depending on daily usage). No need to charge constantly, just breathe, track, and go.
• Portable and Non-Invasive: Lumen comes in a sleek protective case, so you can slip it into your pocket, gym bag, or purse and track your metabolism wherever you go.
• iPhone and Apple Watch Compatibility: Get your Lumen data at a glance from your iPhone or Apple Watch. You can also access a companion version of the Lumen App on your Apple Watch.
• Android Compatibility: The award-winning Lumen App is compatible on Android devices running Android 8.0 and higher with Google Play services. The device must also support Bluetooth 4.0.
• Extensive App Integrations: Automatically sync your health and workout data from your favorite apps through Apple Health, Google Fit, and Garmin. Extensive app integrations include Oura, Whoop, Polar, Fitbit, Myfitnesspal, and more.
• Real-Time Metabolic Insights: Lumen is the world’s first handheld device that measures your metabolism through your breath, revealing in seconds whether you’re burning carbs or fats. Using a built-in CO₂ sensor and flow meter, it gives you personalized, real-time insights, so you can adjust nutrition, exercise, or fasting for more effective results.
• Lumen Membership: Enjoy your first month of Lumen membership free with your purchase — plus lifetime access to your metabolic breath results. After your free month, you may subscribe and continue to enjoy the full app experience according to a monthly plan of $19/month or our yearly plan of $180/year. This offer is available to new members only and can be canceled anytime.
• Track the Impact of Your Habits: By tracking how your metabolism responds to your nutrition, fitness, sleep, and stress levels, Lumen reveals how your lifestyle impacts your metabolic health and guides you toward optimal habits for your unique body.
• Unlock Key Benefits: As you start improving your metabolism, you’ll start to see the benefits. Manage your weight, boost fat burn, and reach your goals with more ease. Elevate your athletic performance, increase your energy, and enjoy sharper focus and mental clarity throughout the day. Plus, experience deeper, more restful sleep to help your body recover and perform at its best.
• Transform Your Weight Management Journey: Lumen's weight loss track guides you to adjust your lifestyle and your macros to optimize fat burn and accelerate fat loss.
• Daily Personalized Nutrition Plan: Each day, Lumen translates your breath into a personalized nutrition plan. It guides your carb, fat, and protein intake to match your metabolic state, goals, and lifestyle. Whether you're aiming for fat burn, energy, or recovery, your plan adapts in real time so you always know what and when to eat.
• Maximize Your Fitness Performance and Training Results: Fine-tune carb and fat utilization for peak performance. Take a breath measurement before and after your workouts to pinpoint fueling for training and optimal recovery. You will also receive nutritional recommendations for fueling up pre-workout and recovery for post-workout.
• Intermittent Fasting Game-Changer: Whether you’re new to fasting or experienced, Lumen lets you discover your optimal fasting and fat-burning window each day. You never have to guess again if your fast is effective or if you should break it to avoid muscle breakdown.
• Menopause Support and Guidance: Hormonal changes during menopause can challenge metabolism, weight management, fitness, and energy. Lumen offers personalized nutrition guidance to help you adapt and maintain balance throughout the transition.
• Sync Your Nutrition Around Your Menstrual Cycle: Track your menstrual cycle and gain insights into how to adjust your nutrition and lifestyle choices based on it, ensuring your metabolism is supported at every stage.
• AI-Powered Food Log: Log your meals in a single snap on your phone’s camera or via voice recording for tracking and accountability that fits into your busy life. Lumen uses AI to scan the macros in your meal so you can easily track and log your target macros for the day.
• Expert-Backed Guides and Videos: Gain access to and explore in-depth guides and videos in the Lumen app, which will help you learn more about how to optimize your nutrition, metabolism, and energy—all at your own pace.
• Cutting-Edge Health Technology: Lumen is the world’s first handheld metabolic health tracker, giving you lab-level insights in the palm of your hand, so you make smarter choices for your body’s needs.
• Award-Winning Science: Lumen was named a Time Best Invention and recognized for its innovation and scientific rigor by CNBC, CES, Men’s Fitness, and more. Lumen also partners with dozens of universities worldwide, contributing to groundbreaking metabolic research.
• Scientifically Validated: Lumen is scientifically validated in peer-reviewed studies to meet the gold standard for metabolic measurement, ensuring accurate and reliable metabolic insights.
• Long-lasting Battery for Daily Use: Lumen is powered by a rechargeable lithium polymer battery that can last up to 10 days on a single charge (depending on daily usage). No need to charge constantly, just breathe, track, and go.
• Portable and Non-Invasive: Lumen comes in a sleek protective case, so you can slip it into your pocket, gym bag, or purse and track your metabolism wherever you go.
• iPhone and Apple Watch Compatibility: Get your Lumen data at a glance from your iPhone or Apple Watch. You can also access a companion version of the Lumen App on your Apple Watch.
• Android Compatibility: The award-winning Lumen App is compatible on Android devices running Android 8.0 and higher with Google Play services. The device must also support Bluetooth 4.0.
• Extensive App Integrations: Automatically sync your health and workout data from your favorite apps through Apple Health, Google Fit, and Garmin. Extensive app integrations include Oura, Whoop, Polar, Fitbit, Myfitnesspal, and more.