In a single breath, see if your body is using fats or carbs for fuel and what to do about it. Lumen is the first device and app to help you lose weight, optimize your work out and learn how to eat healthier in a single breath. With Lumen, you get daily metabolism tracking, personalized meal recommendations, workout optimization and more. You can visit our website at lumen.me to learn how you can start hacking your metabolism today. | Lumen

Since the first prototypes of Lumen began, our users have used Lumen's technology to measure metabolism *one million times!* To date, Lumen is being used in 126 countries. So we asked some of our users around the world to share how they're hacking their metabolism with Lumen! | Lumen