This is because when your cells metabolize carbs, they produce more CO2 compared to when they metabolize fat.
The higher your CO2 concentration, the more you are burning carbs for fuel. To understand what any of this means to you, we need to take a second to explain how the Lumen device harnesses the tenets of metabolic science.īasically, Lumen measures your metabolism/metabolic rate based on the concentration of carbon dioxide (CO2) in your breath.
Lumen review: What exactly is Lumen measuring?