I found this article interesting as it discusses how our DNA gets faulty through our life span and when it does, it affects the basic working order of our bodies or causes cancer. 

https://getpocket.com/explore/item/mystery-of-why-humans-die-around-80-may-finally-be-solved?utm_source=pocket-newtab-en-us

Humans and animals die after amassing a similar number of genetic mutations, researchers have found, suggesting the speed of DNA errors is critical in determining the lifespan of a species.

I think it's possible to extend our lifespans with good nutrition and taking care of our mitochondria, while also keeping our stem cells well and stalling our senescent cells cycle.

Mark Ransome said:

Interesting article, but you lost me with:

taking care of our mitochondria, while also keeping our stem cells well and stalling our senescent cells cycle.

Lol

Lol....our mitochondria are our ultimate health drivers and our stem cells grow less vibrant as we age.....senescent cells when they die, for example when people go gray, they have lost that cell health that allowed their hair color to be maintained. 

There's a large market now for stem cells either through IV or injected in damaged joints or for health challenges etc.  Stem Cells are also being used to rejuvenate skin. 

@Alexis Bello, yes, nothing replaces good nutrition.