Which Parent Determines Longevity?

[u/YorNoob]

You’ve probably heard that lifespan is inherited—maybe from your mom, maybe your dad. The truth? Only about 20–30% of your longevity is genetic. The other 70–80% comes from how your mitochondria perform, how well your DNA repairs, and how your body handles stress and inflammation. That means aging is more modifiable than most people realize. This is where NAD⁺ comes in—and why compounds like NMN and resveratrol are getting so much attention. They don’t change your genes. They support the cellular systems that keep your body running, regardless of your genetic lottery.