Is the answer to the fountain of youth NO or NR? Nicotinamide riboside or NR is getting a lot of attention. The science is mainly in animal studies but a few human ones exist. Can it help us live longer or better? Can we add it to a longevity Blue Zones lifestyle and gain even more? Is it a "mimetic" to garner the health advantages of fasting or calorie restriction? These questions and more are the focus of this week's discussion. To life!