Cholesterol has a problem.
It can’t move through blood on its own.
It doesn’t dissolve.
It doesn’t circulate freely.
So the body has to build a system to carry it.
That system is made up of particles called lipoproteins.
These particles act like transport vehicles.
They package cholesterol and triglycerides and move them through the bloodstream.
LDL is one of those particles.
VLDL is another.
HDL plays a different role.
But the key point is this:
Cholesterol is never traveling alone.
It is always inside a particle.
Once you see that, the model shifts.
Because the bloodstream isn’t just holding cholesterol.
It’s filled with particles, constantly moving, changing, and being cleared.
Some are produced by the liver.
Some are transformed as they circulate.
All of them eventually need to be removed.
At any given moment, what you’re looking at is not a static number.
It’s a system in motion.
Particles entering.
Particles leaving.
Particles interacting with tissues along the way.
And that changes how risk is understood.
Because the arterial wall doesn’t interact with cholesterol directly.
It interacts with particles.
Each one represents a chance for something to happen.
Most pass through without consequence.
Some don’t.
Some enter the arterial wall.
Some get retained.
And over time, those retained particles begin the process that leads to plaque.
So the question isn’t just how much cholesterol is present.
It’s how many particles are carrying it.
Because more particles means more chances for that process to begin.
This is the shift.
From measuring cargo…
to understanding the system that moves it.
And once you start looking at it that way, the next question becomes unavoidable.
What actually determines how many of those particles are there in the first place?
Continue reading - The Two Forces That Actually Determine Risk
Or start here - The LIV System