LDL Particle Number (LDL-P)
Here’s what it reflects — and what to do about it.
Longetic pulls together every lab and record you’ve had, follows how LDL Particle Number (LDL-P) changes over time, and explains what’s shifting — so you walk into your next appointment prepared, with reminders for retests along the way.
What is LDL Particle Number (LDL-P)?
An advanced blood test that counts how many LDL (bad cholesterol) particles are circulating in your blood, rather than just measuring the cholesterol they carry.
Standard cholesterol tests measure the amount of cholesterol packed inside LDL particles, while LDL particle number counts the particles themselves, usually using a lab method called NMR. Because it is possible to have a normal cholesterol number but a high particle count, some clinicians use LDL-P to look more closely at heart-related risk. A higher particle number can be associated with a greater likelihood of cardiovascular events over time, though it is one piece of a bigger picture and is an advanced, extended test rather than a routine screen.
What to know about LDL Particle Number (LDL-P)
Understanding LDL Particle Number (LDL-P) means knowing what it reflects, what tends to move it, and the signs that suggest it’s worth a closer look — so you can bring the right questions to your next appointment.
This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Medical Disclaimer.
References
About our sources
Official sources
Government health agencies, national institutes, and intergovernmental bodies whose guidelines carry regulatory or policy weight.
Clinical / professional
Medical societies, specialty colleges, and professional associations whose consensus statements reflect clinical practice standards.
Peer-reviewed research
Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.