Lumen AI

About Lumen AI

Lumen is a handheld metabolic tracker that measures carbon dioxide concentration in a single breath to determine whether the body is burning primarily carbohydrates or fat for energy—providing daily metabolic flexibility insights that were previously only available in clinical metabolic testing. Its AI analyzes breath measurements, sleep data, activity levels, and nutrition logs to generate daily personalized nutrition recommendations optimized for metabolic health, fat loss, or performance goals. Lumen's AI learns each user's metabolic patterns over time, providing increasingly personalized guidance for nutrition timing, carbohydrate intake, and lifestyle choices that improve metabolic flexibility.