Hi Emin Emini, we use various biometrics to calculate your Energy Bank and Stress levels. Caffeinated drinks typically raise your heart rate and other stress-related markers, which can lead to increased stress and faster energy depletion in our system. At Bevel, "energy" refers to your body's recovery capacity and how quickly it gets drained. While naps and mindfulness can help recharge it, caffeine doesn’t contribute to recovery in this context. Hope that clarifies—let me know if you have any questions!