Scientists can now measure how fast you're aging. Down to the year.

It's called an epigenetic clock. It reads your DNA methylation patterns and tells you not how old you are, but how old your biology is.
The two numbers are not the same.
Your chronological age is fixed. Your biological age moves. Stress accelerates it. Sleep slows it. Obesity adds years. Exercise removes them.
In one human trial, a combination of growth hormone, metformin, and DHEA didn't just slow the clock. It reversed it. Participants ended the study biologically younger than when they started.
That's not a metaphor. The methylation data said so.
The implications are uncomfortable. If biological age is fluid, then aging is less a sentence and more a variable. Something that responds to inputs. Something that can be managed.
Biohacking used to mean cold plunges and supplement stacks. It's starting to mean something else entirely.
The question is no longer whether aging can be slowed.
The question is how many people will have access when it can be stopped.