When NAD+ falls, everything downstream starts to slow. Energy production slows. Cellular cleanup slows. Your body's ability to clear out old, damaged cells slows too. Think of it like a maintenance crew in a large building. When the crew is fully staffed, everything runs smoothly. Cut that crew in half, and things start to pile up.
Precision Longevity Core is designed around the foundational mechanisms of cellular aging: NAD+ replenishment, mitochondrial quality control, senolytic support, and the broad-spectrum micronutrient base your body needs to run hundreds of enzymatic reactions every day. This is the stack we'd suggest most people start with, because these are the pathways everything else depends on.