In a single breath, take the guesswork out of your nutrition. Lumen is a device and app that measures your metabolism through the breath. With the app, you will receive daily personalized meal plans to stay healthy and optimize your workouts. You may think you have a fast or slow metabolism, but in fact it changes every day based on the food you eat, the amount you sleep and if you workout. ~ Sustainably lose weight ~ Optimize your workouts ~ iOS & Android compatible ~ Backed by science