I am a molecular biologist.

Aging is the ultimate risk factor for a disease or condition that will kill an organism.

Beyond that, there is no consensus on what aging truly is, how it works or what it does at the molecular level. Sure, telomeres get shorter, but it's unclear if that's cause or effect.

There are drugs that might extend lifespan, but how they work, and what the costs are, are unclear.

If it's even possible to get most people over 100 years old, we're decades from a drug/treatment that does it. Immortality would almost certainly require a brain upload into the cloud but is impossible in a human body.