Lumen’s Handheld Metabolism-Tracking Device

Tech that's been around for decades, but never so personalized, easy or efficient

Lumen, a pocket-sized device designed to “hack” and track your metabolism, officially launches today. The device (which resembles a vaporizer) features a hollow interior equipped to read your breath as it passes through. Essentially, it’s founded upon a simple equation: if you’re breathing out high amounts of CO2, you’re burning carbs, and if you’re emitting lower CO2 amounts, you’re burning fat. But the technology designed …