If you've been feeling the mid-afternoon crash a little earlier every year, you've probably already run into NMN somewhere online. It shows up in longevity podcasts, biohacker routines, and increasingly, in regular conversations about aging well instead of just aging. But most of what's written about it either oversimplifies the science or overpromises the results. So let's slow down and actually answer the question: does an NMN supplement give you energy, and what is a 500mg