Sean: If someone is concerned about their heart disease risk, do they just get an LDL
particle size test?
Chris: This is a good question. And I have to say that I was wrong about this early on
as it was something that I did advocate. In fact I have a couple of videos that are still
online that I need to take off that talk about the LDL size particle test. Early on, they
seemed to be a promising way of determining your heart disease risk because the idea
was that if you had a lot of small, dense LDL particles as I just described, thatʼs a sign of
oxidative damage and youʼre at a higher risk for heart disease. And if you had large,
buoyant LDL, then you werenʼt at risk for heart disease.
But there are a couple of problems with this idea that became apparent after more
research. Number one is that there is no consensus about which methodology of testing
particle size is accurate. And the results from each method vary wildly. For example, the
best way to measure the large, buoyant LDL that everyone talks about as being
protective is to measure particle size using tube gel electrophoresis, which is one of the
methods. 80% of people who are measured with tube gel electrophoresis have pattern
A, which is the large, buoyant LDL. Whereas only 8% of people who get a VAP test,
which another competing technology, are in pattern A with the large, buoyant.
So, thatʼs a huge difference. Weʼre talking 80% having large, buoyant with one
methodology, and only 8% having large, buoyant with another. So, something is really
fishy there.
And then you have NMR and GDE, which are two other testing methodologies. And
theyʼre somewhere in between those two extremes. So, basically the results are all over
the map just depending on which technology or methodology you choose to use to
measure your particle size.
So, itʼs not to say that there might not someday be a way of determining particle size
and perhaps one of these methods is more accurate than another, and weʼll determine
what that is. But right now, it seems that we canʼt rely on these tests to accurately
classify particle size.