Small LDL Particle levels: what's normal, high and low
The count of small, dense LDL particles — the most atherogenic LDL subtype.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
The short answer
Small LDL Particle is measured with a standard blood draw after an 8–12 hour fast. A typical reference range is 0.000 – 527 nmol/L. At TestWell it's $70.99 all-in as Advanced Cholesterol Particle Test (NMR), results in 3–5 business days, drawn at Labcorp. An out-of-range result is a prompt to look closer, not a diagnosis.
- Units
- nmol/L
- Sample
- Blood draw
- Fasting
- 8–12 hours
- Results
- 3–5 business days
- Price
- $70.99
- Labs
- Labcorp
Small LDL Particle Reference Range
These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.
| Population | Range |
|---|---|
| age 18+ | 0.000 – 527 nmol/L |
Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.
Have a result in hand? analyze it with your AI assistant using these reviewed ranges, or run it through our explainer. Tools: look up another marker's range · convert lab units
What your Small LDL Particle result may mean
Often reflects insulin resistance or metabolic syndrome and adds risk beyond LDL-C alone.
What a high Small LDL Particle means: causes, symptoms, next steps ↓Educational only — not a diagnosis. Many factors can influence a single result. Discuss anything that concerns you with a healthcare provider.
What does a high Small LDL Particle mean?
Small dense LDL particles penetrate the artery wall more easily and oxidize faster than large ones, so a high small-LDL count marks a more atherogenic profile. It is driven almost entirely by triglycerides and insulin resistance: as triglycerides rise, LDL is remodeled into smaller particles. Lowering triglycerides — less sugar and alcohol, weight loss, activity, treating diabetes — shifts particles larger.
Common causes of a high Small LDL Particle
- Insulin resistance, metabolic syndrome, type 2 diabetes
- High triglycerides and low HDL
- Central obesity, inactivity, refined-carbohydrate diets
- Genetic pattern B lipoprotein phenotype
- Hypothyroidism
Ordered from most to least common.
Symptoms that can go with it
- None
What clinicians usually check next
- Triglycerides, A1c, fasting insulin, ApoB
- Lifestyle changes aimed at triglycerides; retest in 3–6 months
- Cardiovascular risk review with a clinician
Can I change my LDL particle size?
Yes — small LDL responds to lowering triglycerides. Cutting sugar and alcohol, losing central fat, exercising and improving insulin sensitivity all shift the profile toward larger particles within months.
Educational only — not a diagnosis. A single result outside the range is a prompt to look closer with a clinician.
How do you get a Small LDL Particle test?
Order online, a licensed physician reviews the requisition, and you walk into a nearby lab for the draw. Small LDL Particle is available on its own or inside these panels — panels cost less per marker when you want the fuller picture.
| Option | Includes | Price |
|---|---|---|
| Advanced Cholesterol Particle Test (NMR) | This marker only | $70.99 |
| Men's Total Body Advanced Panel | 65 tests | $999.99 |
| Women's Total Body Advanced Panel | 65 tests | $999.99 |
Quest vs. Labcorp for Small LDL Particle: which lab should you pick?
Both are CLIA-certified national labs and the result is clinically equivalent, so pick whichever location is closer. Your report will print that lab's own reference range, which can differ slightly from the table above.
| Lab | Available | Price |
|---|---|---|
| Quest Diagnostics | No | — |
| Labcorp | Yes | $70.99 |
| BioReference (NY & NJ) | No | — |
Need help choosing a location? Use the lab finder to see draw sites near your ZIP.
Related Heart Health biomarkers
Markers commonly tested alongside Small LDL Particle.
Frequently asked
What does a high Small LDL Particle mean?
Small dense LDL particles penetrate the artery wall more easily and oxidize faster than large ones, so a high small-LDL count marks a more atherogenic profile. It is driven almost entirely by triglycerides and insulin resistance: as triglycerides rise, LDL is remodeled into smaller particles. Lowering triglycerides — less sugar and alcohol, weight loss, activity, treating diabetes — shifts particles larger.
Can I change my LDL particle size?
Yes — small LDL responds to lowering triglycerides. Cutting sugar and alcohol, losing central fat, exercising and improving insulin sensitivity all shift the profile toward larger particles within months.
Do I need a doctor's order to test my small ldl particle?
No. TestWell's licensed physician network reviews and approves your order — usually within minutes. You can place an order online without an in-person visit or a referral from your own doctor.
How long does it take to get Small LDL Particle results?
Most Small LDL Particle results are available in 1–3 business days after your specimen arrives at the lab. You'll get an email the moment your results are ready, with everything viewable in your TestWell portal.
How much does a Small LDL Particle test cost?
Our Advanced Cholesterol Particle Test (NMR) starts at $70.99. That's the all-in price — no copays, no insurance hoops, no surprise bills. HSA and FSA cards are accepted.
Do I need to fast before my Small LDL Particle test?
Yes — for the most accurate result, fast for 8–12 hours before your blood draw. Water is fine; coffee, food, and supplements are not. Your prep instructions will be included with your order.
Which lab will process my Small LDL Particle test?
Your test will be processed by Quest Diagnostics, Labcorp, or BioReference depending on which is closest to you and which lab carries the test. All three are CLIA-certified and trusted by hospitals nationwide. You'll choose your lab during checkout from 4,000+ locations.
Ready to test your small ldl particle?
Order in two minutes, get physician-approved, and visit a lab the same day. Starts at $70.99.