LP-IR Score: What It Means, Normal Range & What "Less Than 25" Means

Serum Plasma

Other names: LP-IR Score, LPIR Score, LP IR Score, LP-IR, LPIR, LpIR, Lipoprotein Insulin Resistance Score, Lipoprotein Insulin Resistance Index, LP-IR Index, NMR Lipoprofile Insulin Resistance Score, NMR LP-IR, Cardio IQ Insulin Resistance Panel with Score, Cardio IQ Insulin Resistance Panel, LP Insulin Resistance Score, LP Insulin Resistance Index, LP-IR Score Calculator, LIPR Score, LIPR, LP-IR Score NMR, LP-IR Score Quest Diagnostics, LP-IR Score LabCorp, LP-IR Score Cleveland HeartLab, LP-IR Score Blood Test, LPIR Blood Test, LPIR Test, LP-IR Test, Lipoprotein IR Score, Lp Insulin Resistance, LP-IR Score Meaning, LPIR Score Meaning, LP-IR Score Chart, LP-IR Score Range, NMR Lipoprofile + Lipids + IR, LP-IR Score Deutsch (German), LPIR Score Adalah (Indonesian), LPIR Score Co To (Polish), LPIR Τεστ (Greek), تحليل LPIR (Arabic)

check icon Optimal Result: 0 - 45 Units.

QUICK ANSWER

The LP-IR Score measures insulin resistance using the size and concentration of lipoprotein particles in your blood. It is calculated from an NMR lipoprofile blood test and reported on a scale of 0–100.

Optimal: less than 25. A score below 25 indicates low insulin resistance — a favourable result. Higher scores indicate increasing insulin resistance and rising cardiometabolic risk.

The LP-IR Score is one of the earliest detectable markers of insulin resistance — it often rises before fasting glucose or HbA1c become abnormal.


Key takeaway: A high LP-IR score often appears years before diabetes develops. A score below 25 is generally considered metabolically favourable. Many people with elevated LP-IR scores still have normal fasting glucose and normal HbA1c — this reflects early insulin resistance, not necessarily diabetes.

Score Meaning
< 25 Optimal
25–45 Borderline
45–60 Elevated
> 60 High

WHAT IS A GOOD LP-IR SCORE? WHAT DOES "LESS THAN 25" MEAN?

A score below 25 is the optimal target. This is the threshold used by the test's developers (LabCorp/Liposcience) to define low insulin resistance on the NMR lipoprofile.

A score of exactly 25 sits at the upper boundary of the optimal range. Many clinicians treat scores at or just above 25 as borderline rather than clinically significant — clinical context and trend over time matter more than any single value.

"Less than 25" on your report means your lipoprotein particle profile is consistent with good insulin sensitivity. This is a reassuring result and does not indicate insulin resistance.

The scale runs from 0 to 100:

LP-IR Score Interpretation Clinical context
< 25 Optimal Low insulin resistance; favourable cardiometabolic profile
25–45 Borderline Early or mild insulin resistance; monitor with lifestyle focus
45–60 Elevated Moderate insulin resistance; intervention recommended
> 60 High Significant insulin resistance; clinical evaluation warranted
> 75 Very high Marked insulin resistance; associated with high T2D and CVD risk

The LP-IR Score is reported on a scale of 0–100. Higher scores indicate greater insulin resistance.


WHAT IS THE LP-IR SCORE?

The LP-IR Score (Lipoprotein Insulin Resistance Score) is a composite measure of insulin resistance derived from NMR (nuclear magnetic resonance) spectroscopy analysis of a blood sample. It is part of the NMR LipoProfile test, available through LabCorp (formerly Liposcience) and included in some advanced lipid panels such as the Cardio IQ Insulin Resistance Panel.

Why lipoprotein particles? Insulin resistance causes characteristic changes in the size and concentration of lipoprotein particles — specifically, it increases large VLDL particles and small LDL and HDL particles. These changes occur before glucose or insulin levels become overtly abnormal, making the LP-IR Score a sensitive early marker.

The six components: The LP-IR Score is calculated from six NMR-measured lipoprotein parameters:

  • Large VLDL particle concentration (↑ in insulin resistance)
  • Large VLDL particle size
  • Small LDL particle concentration (↑ in insulin resistance)
  • LDL particle size (smaller = more insulin-resistant pattern)
  • Small HDL particle concentration (↑ in insulin resistance)
  • HDL particle size (smaller = more insulin-resistant pattern)

These six values are fed into a proprietary algorithm that produces the 0–100 score. The exact formula is not publicly disclosed, but the underlying research is published (Shalaurova et al., 2014).

LP-IR vs HOMA-IR: HOMA-IR is calculated from fasting insulin and fasting glucose. LP-IR is calculated from lipoprotein particle measurements. Both assess insulin resistance but via different mechanisms — LP-IR reflects the metabolic lipid signature of insulin resistance, while HOMA-IR reflects the direct hormone/glucose relationship. LP-IR has been shown to detect insulin resistance earlier than HOMA-IR in some populations.

How LP-IR compares to other insulin resistance markers:

Test What it measures Typically earliest? Requires fasting?
LP-IR Score Lipoprotein particle insulin resistance pattern Often earliest — detects lipid changes before glucose rises Yes
Fasting insulin Circulating insulin at rest Early — rises before glucose abnormalities Yes
HOMA-IR Glucose + insulin relationship Early — calculated from both markers Yes
HbA1c 3-month average blood glucose Later — reflects established glucose dysfunction No
Fasting glucose Blood sugar after overnight fast Later than insulin and LP-IR Yes

LP-IR interpretation should always be considered alongside triglycerides, HDL cholesterol, fasting glucose, HbA1c, medications, and overall metabolic context. No single marker determines insulin resistance on its own.


WHAT DOES A HIGH LP-IR SCORE MEAN?

A high LP-IR score (above 45, and particularly above 60) indicates significant insulin resistance — your cells are responding poorly to insulin, and your lipoprotein particle profile reflects the metabolic consequences of this.

What causes a high LP-IR score:

  • Excess visceral (abdominal) adiposity
  • Sedentary lifestyle and low physical activity
  • High refined carbohydrate and ultra-processed food intake
  • Poor sleep quality or quantity
  • Chronic psychological stress
  • Polycystic ovary syndrome (PCOS)
  • Non-alcoholic fatty liver disease (NAFLD) — LP-IR directly reflects hepatic fat content and worsens as liver fat increases.
  • Family history of type 2 diabetes or metabolic syndrome
  • Certain medications (corticosteroids, antipsychotics)

What a high score means clinically: Insulin resistance detected early — before fasting glucose or HbA1c is abnormal — represents the optimal intervention window. A high LP-IR score with normal fasting glucose means the pancreas is compensating by producing more insulin. This compensation can last years before blood sugar rises. Acting on a high LP-IR score at this stage can prevent or significantly delay progression to prediabetes and type 2 diabetes.

Many people with elevated LP-IR scores still have normal fasting glucose and normal HbA1c. This is not a contradiction — it reflects early insulin resistance in the compensation phase, not diabetes. The LP-IR Score is specifically valuable because it captures this window.

Insulin resistance can occur in people with normal body weight. Visceral fat accumulation (fat around abdominal organs rather than subcutaneous fat), PCOS, family history of type 2 diabetes, low muscle mass, and certain ethnicities are all associated with insulin resistance independent of BMI. A normal weight does not exclude insulin resistance.

Related markers to evaluate alongside a high LP-IR score: Fasting Insulin · HOMA-IR · Triglycerides · HDL Cholesterol · HbA1c · Fasting Glucose · ApoB

Symptoms that may accompany insulin resistance (and a high LP-IR score):

  • Persistent fatigue, especially after carbohydrate-heavy meals
  • Abdominal weight gain or difficulty losing weight around the midsection
  • Sugar cravings or energy crashes between meals
  • Elevated fasting triglycerides (>150 mg/dL)
  • Low HDL cholesterol
  • Acanthosis nigricans (darkening of skin at neck, armpits, or groin)
  • Brain fog or difficulty concentrating
  • In women: irregular menstrual cycles, PCOS, or elevated androgens

Note: insulin resistance can be present without any symptoms — the LP-IR Score's value is detecting it before symptoms appear.

Other markers to check alongside a high LP-IR score: Fasting insulin, HOMA-IR, HbA1c, fasting glucose, triglycerides, HDL cholesterol, and ferritin. Triglycerides/HDL ratio is a simple additional insulin resistance marker that correlates well with LP-IR.


HOW TO LOWER YOUR LP-IR SCORE

The LP-IR Score is highly responsive to lifestyle intervention — it is one of the most modifiable metabolic biomarkers available.

Interventions with the strongest evidence for lowering LP-IR:

1. Reduce refined carbohydrates and ultra-processed foods High refined carbohydrate intake drives postprandial insulin secretion and promotes the large VLDL and small LDL particle pattern that raises LP-IR. Sustained carbohydrate restriction has been shown to significantly reduce LP-IR within 12 months in people with type 2 diabetes, with improvements correlating with the degree of carbohydrate reduction.

2. Resistance training Resistance (strength) training is the single most effective exercise modality for improving insulin sensitivity. It increases glucose uptake in muscle tissue independent of insulin and shifts lipoprotein particles toward the larger, more insulin-sensitive pattern. Even two sessions per week produces measurable improvement.

3. Aerobic exercise Regular moderate-to-vigorous aerobic activity (brisk walking, cycling, swimming) improves insulin sensitivity and lowers triglycerides, which directly improves the VLDL particle pattern.

4. Reduce visceral fat Even modest weight loss (5–10% of body weight) in overweight individuals significantly improves LP-IR by reducing hepatic fat and improving hepatic insulin sensitivity. Abdominal fat reduction has the greatest impact on the lipoprotein components of the LP-IR formula.

5. Improve sleep Poor sleep (both insufficient duration and poor quality) worsens insulin resistance within days. Even one week of sleep restriction raises LP-IR-associated markers. Targeting 7–9 hours of quality sleep is a high-value metabolic intervention.

6. Reduce chronic stress Chronic cortisol elevation from psychological stress worsens insulin resistance and directly impacts VLDL particle size. Stress reduction through structured approaches (mindfulness, time in nature, social connection) has measurable metabolic benefit.

Medication: In cases where lifestyle intervention is insufficient, metformin is the most commonly used insulin sensitiser. GLP-1 receptor agonists (semaglutide, tirzepatide) and SGLT2 inhibitors also significantly improve insulin sensitivity and lipoprotein particle profiles.

Timeline: The LP-IR Score can improve within 8–12 weeks of consistent lifestyle intervention. Retesting after 3 months of sustained changes is a reasonable way to monitor response.

Importantly, lifestyle improvements lower LP-IR even without extreme dietary restriction — moderate, sustainable changes produce meaningful results.


HOW IS THE LP-IR SCORE CALCULATED?

The LP-IR Score is calculated from a single blood draw using NMR (nuclear magnetic resonance) spectroscopy — a technology that measures the size and concentration of lipoprotein particles by detecting the resonance signals of lipid molecules in the sample.

What you need for the test:

  • Standard blood draw (serum or plasma)
  • Fasting for 9–12 hours recommended for the most accurate lipid particle measurements
  • The test must be specifically ordered — it is not included in standard lipid panels

Where to get it:

  • LabCorp: ordered as "NMR LipoProfile + Lipids + IR" or "Cardio IQ Insulin Resistance Panel with Score"
  • Cleveland HeartLab: included in advanced metabolic panels
  • Quest Diagnostics: some advanced panels include LP-IR
  • Available through functional medicine practitioners and some direct-to-consumer lab services

Can I calculate my own LP-IR score? No — the score requires NMR particle measurement and a proprietary algorithm. It cannot be calculated from standard lipid panel values. However, the triglycerides/HDL ratio (TG÷HDL in mg/dL) is a simpler and freely calculable surrogate for insulin resistance that correlates moderately with LP-IR. A TG/HDL ratio below 2 is generally considered favourable; above 3 suggests possible insulin resistance.

A 2024 study found that TG/HDL ratio and LP-IR score showed parallel associations with subclinical atherosclerosis and cardiovascular events, supporting TG/HDL as a practical surrogate.


LP-IR SCORE COMMON REPORT PHRASES

LP-IR SCORE
LPIR SCORE
LP IR SCORE
LP-IR
LPIR
LIPOPROTEIN INSULIN RESISTANCE SCORE
LIPOPROTEIN INSULIN RESISTANCE INDEX
LP-IR INDEX
NMR LIPOPROFILE + LIPIDS + IR
CARDIO IQ INSULIN RESISTANCE PANEL WITH SCORE
CARDIO IQ® INSULIN RESISTANCE PANEL WITH SCORE
LP-IR SCORE <25 (OPTIMAL)
LP-IR SCORE 0-45 (REFERENCE RANGE)
INSULIN RESISTANCE SCORE (NMR)

FAQ about LP-IR Score

  • What is a good LP-IR score?

    The optimal LP-IR score is less than 25. Scores below 25 indicate low insulin resistance and a favourable lipoprotein particle profile. Scores of 25–45 are borderline, 45–60 are elevated, and above 60 indicates significant insulin resistance. The scale runs from 0 to 100, with higher scores reflecting greater insulin resistance.
  • What does "LP-IR score less than 25" mean?

    A score below 25 is the optimal target — it means your lipoprotein particle profile is consistent with good insulin sensitivity and low insulin resistance. This is a reassuring result. The threshold of 25 is used by LabCorp/Liposcience (the test developers) as the upper boundary of the optimal range.
  • What does a high LP-IR score mean?

    A high LP-IR score (above 45, particularly above 60) indicates significant insulin resistance. Your lipoprotein particle profile — larger VLDL particles, more small LDL particles, smaller HDL particles — reflects the metabolic changes associated with insulin resistance. A high score often precedes abnormal fasting glucose or HbA1c by years, making it an early warning signal for cardiometabolic risk.
  • How is the LP-IR score calculated?

    The LP-IR score is calculated from six NMR-measured lipoprotein parameters: large VLDL particle concentration, large VLDL size, small LDL particle concentration, LDL particle size, small HDL particle concentration, and HDL particle size. These are measured via nuclear magnetic resonance (NMR) spectroscopy from a standard blood draw and fed into a proprietary algorithm. The score cannot be calculated from standard lipid panel values.
  • What is the LP-IR score scale?

    The LP-IR score runs from 0 to 100. Less than 25 is optimal. 25–45 is borderline. 45–60 is elevated. Above 60 is high. Above 75 is very high and associated with marked insulin resistance, elevated T2D risk, and cardiovascular risk.
  • How do I lower my LP-IR score?

    The LP-IR score is highly responsive to lifestyle intervention. The most effective approaches are resistance training (the single most effective exercise modality for insulin sensitivity), reducing refined carbohydrates and ultra-processed foods, losing visceral fat, improving sleep quality and duration, and reducing chronic stress. The LP-IR score can improve within 8–12 weeks of consistent lifestyle changes.
  • What is the difference between LP-IR and HOMA-IR?

    Both measure insulin resistance but via different mechanisms. HOMA-IR is calculated from fasting insulin and fasting glucose — it directly measures the hormone/glucose relationship. LP-IR is calculated from lipoprotein particle measurements via NMR — it measures the metabolic lipid signature of insulin resistance. LP-IR can detect insulin resistance earlier than HOMA-IR in some populations because lipoprotein particle changes precede glucose abnormalities.
  • Is the LP-IR score the same as NMR lipoprofile?

    Not exactly. The NMR lipoprofile is the broader test that measures multiple lipoprotein particle parameters (LDL-P, HDL-P, LDL size, etc.). The LP-IR score is a specific composite index derived from six of those parameters that is specifically calibrated to reflect insulin resistance. Some NMR lipoprofile orders include the LP-IR score; others may not. Ask your doctor or check your lab report for "LP-IR Score" or "Insulin Resistance Score."
  • How often should I retest my LP-IR score?

    Retesting after 8–12 weeks of sustained lifestyle change is reasonable — the LP-IR Score responds relatively quickly to metabolic improvement because lipoprotein particle profiles shift within weeks of consistent intervention. For ongoing monitoring without active intervention, annual retesting as part of an advanced lipid panel is typical. If you are tracking response to a specific dietary, exercise, or medication change, 3 months provides enough time to see meaningful movement.
  • Where can I get an LP-IR score test?

    The LP-IR score is available through LabCorp (ordered as NMR LipoProfile + Lipids + IR or Cardio IQ Insulin Resistance Panel with Score), Cleveland HeartLab, and some Quest Diagnostics panels. It is also available through functional medicine practitioners and some direct-to-consumer lab services. It must be specifically ordered — it is not part of standard lipid panels or comprehensive metabolic panels.

What does it mean if your LP-IR Score result is too high?

An LP-IR Score above 45 indicates elevated insulin resistance. Your lipoprotein particle profile — specifically the pattern of large VLDL, small LDL, and small HDL particles — reflects that your cells are responding poorly to insulin.

This is clinically important: A high LP-IR score often rises years before fasting glucose or HbA1c becomes abnormal. Detecting insulin resistance at this stage represents the optimal intervention window — before the progression to prediabetes or type 2 diabetes.

Scores above 60 indicate significant insulin resistance with associated cardiovascular risk. Discuss with your doctor. Targeted lifestyle intervention — particularly resistance training, reduced refined carbohydrates, and improved sleep — can lower the LP-IR Score meaningfully within 8–12 weeks.

Related Health Conditions

Related Biomarkers

Article Review & Sources

All our content is backed by peer-reviewed studies, academic research, and trusted medical sources. We're committed to accuracy and transparency — see our editorial policy for details.

Laboratories

Bring All Your Lab Results Together — In One Place

We accept reports from any lab, so you can easily collect and organize all your health information in one secure spot.

lab corp logo
genova diagnostics logo
quest diagnostics logo
dutch test logo
doctors data logo
vibrant america logo
diagnostic solutions logo
zrt laboratory logo
the great plains laboratory logo
cyrex laboratories logo
spectracell logo

Pricing Table

decoration

Personal plans

$79/ year

Advanced Plan

Access your lab reports, explanations, and tracking tools.

  • Import lab results from any provider
  • Track all results with visual tools
  • Customize your reference ranges
  • Export your full lab history anytime
  • Share results securely with anyone
  • Receive 5 reports entered for you
  • Cancel or upgrade anytime

$250/ once

Unlimited Account

Pay once, access everything—no monthly fees, no limits.

  • Import lab results from any provider
  • Track all results with visual tools
  • Customize your reference ranges
  • Export your full lab history anytime
  • Share results securely with anyone
  • Receive 10 reports entered for you
  • No subscriptions. No extra fees.

$45/ month

Pro Monthly

Designed for professionals managing their clients' lab reports

  • Import lab results from any provider
  • Track lab results for multiple clients
  • Customize reference ranges per client
  • Export lab histories and reports
  • Begin with first report entered by us
  • Cancel or upgrade anytime

About membership

What's included in a Healthmatters membership

microscope icon Import Lab Results from Any Source

person icon See Your Health Timeline

book icon Understand What Your Results Mean

textbook icon

textbook icon Visualize Your Results

folder icon

folder icon

card icon Securely Share With Anyone You Trust

Let Your Lab Results Tell the Full Story

What Healthmatters Members Are Saying

5 stars rating

I have been using Healthmatters.io since 2021. I travel all over the world and use different doctors and health facilities. This site has allowed me to consolidate all my various test results over 14 years in one place. And every doctor that I show this to has been impressed. Because with  any health professional I talk to, I can pull up historical results in seconds. It is invaluable. Even going back to the same doctor, they usually do not have the historical results from their facility in a graph format. That has been very helpful.

Anthony

Unlimited Plan Member since 2021

5 stars rating

What fantastic service and great, easy-to-follow layouts! I love your website; it makes it so helpful to see patterns in my health data. It's truly a pleasure to use. I only wish the NHS was as organized and quick as Healthmatters.io. You've set a new standard for health tracking!

Karin

Advanced Plan Member since 2020

5 stars rating

As a PRO member and medical practitioner, Healthmatters.io has been an invaluable tool for tracking my clients' data. The layout is intuitive, making it easy to monitor trends and spot patterns over time. The ability to customize reports and charts helps me present information clearly to my clients, improving communication and outcomes. It's streamlined my workflow, saving me time and providing insights at a glance. Highly recommended for any practitioner looking for a comprehensive and user-friendly solution to track patient labs!

Paul

Healthmatters Pro Member since 2024

Use promo code to save 10% off any plan.

shield icon

We implement proven measures to keep your data safe.

At HealthMatters, we're committed to maintaining the security and confidentiality of your personal information. We've put industry-leading security standards in place to help protect against the loss, misuse, or alteration of the information under our control. We use procedural, physical, and electronic security methods designed to prevent unauthorized people from getting access to this information. Our internal code of conduct adds additional privacy protection. All data is backed up multiple times a day and encrypted using SSL certificates. See our Privacy Policy for more details.

gdpr compliance image hipaa compliance image