Ulta Lab Tests

Remnant & Particle Burden Panel

The Remnant & Particle Burden Panel evaluates advanced lipid, particle, and inflammatory markers to uncover hidden cardiovascular risk. By combining a comprehensive lipid panel with ApoB, ApoC-III, Direct LDL, hs-CRP, and Lipoprotein (a), this blood test assesses atherogenic particle number, remnant burden, inherited risk, and vascular inflammation beyond standard cholesterol testing.

Serum, Blood
Phlebotomist

Advanced Remnant & Particle Risk Panel

The following is a list of what is included in the item above. Click the test(s) below to view what biomarkers are measured along with an explanation of what the biomarker is measuring.

Apolipoprotein B

Also known as: Cholesterol, LDL, LDL, LDL Cholesterol, Direct, Low Density Lipoprotein

Direct LDL

The test for low-density lipoprotein cholesterol (LDL-C) is used as part of a lipid profile to predict an individual's risk of developing heart disease. The LDL cholesterol is considered the most important form in determining risk of heart disease. LDL values amy be used to monitor levels after the start of diet or exercise programs or to determine whether or not prescribing one of the lipid-lowering drugs, such as statins, would be useful.

Also known as: C-Reactive Protein, Cardio CRP, Cardio hs-CRP, CRP, High Sensitivity CRP, High-sensitivity C-reactive Protein, High-sensitivity CRP, Highly Sensitive CRP, hsCRP, Ultra-sensitive CRP

Hs Crp

A high-sensitivity CRP (hs-CRP) test may be used by itself, in combination with other cardiac risk markers, or in combination with a lipoprotein-associated phospholipase A2 (Lp-PLA2) test that evaluates vascular inflammation. The hs-CRP test accurately detects low concentrations of C-reactive protein to help predict a healthy person's risk of cardiovascular disease (CVD). High-sensitivity CRP is promoted by some as a test for determining a person's risk level for CVD, heart attacks, and strokes. The current thinking is that hs-CRP can play a role in the evaluation process before a person develops one of these health problems.

Also known as: Cholesterol, HDL,Fasting Lipids,Cholesterol, LDL, Fasting Lipids, Lipid Panel (fasting), Lipid Profile (fasting), Lipids

Chol/HDLC Ratio

Cholesterol, Total

Cholesterol is a waxy, fat-like substance that occurs naturally in all parts of the body. Your body needs some cholesterol to work properly. But if you have too much in your blood, it can combine with other substances in the blood and stick to the walls of your arteries. This is called plaque. Plaque can narrow your arteries or even block them. High levels of cholesterol in the blood can increase your risk of heart disease. Your cholesterol levels tend to rise as you get older. There are usually no signs or symptoms that you have high blood cholesterol, but it can be detected with a blood test. You are likely to have high cholesterol if members of your family have it, if you are overweight or if you eat a lot of fatty foods. You can lower your cholesterol by exercising more and eating more fruits and vegetables. You also may need to take medicine to lower your cholesterol.

HDL Cholesterol

LDL-Cholesterol

Non HDL Cholesterol

Triglycerides

Triglycerides are a form of fat and a major source of energy for the body. This test measures the amount of triglycerides in the blood. Most triglycerides are found in fat (adipose) tissue, but some triglycerides circulate in the blood to provide fuel for muscles to work. After a person eats, an increased level of triglycerides is found in the blood as the body converts the energy not needed right away into fat. Triglycerides move via the blood from the gut to adipose tissue for storage. In between meals, triglycerides are released from fat tissue to be used as an energy source for the body. Most triglycerides are carried in the blood by lipoproteins called very low density lipoproteins (VLDL). High levels of triglycerides in the blood are associated with an increased risk of developing cardiovascular disease (CVD), although the reason for this is not well understood. Certain factors can contribute to high triglyceride levels and to risk of CVD, including lack of exercise, being overweight, smoking cigarettes, consuming excess alcohol, and medical conditions such as diabetes and kidney disease.

Also known as: Lipoprotein A, Lp (a), Lp(a)

Lipoprotein (A)

Lipoprotein-a, or Lp(a) are molecules made of proteins and fat. They carry cholesterol and similar substances through the blood. A high level of Lp(a) is considered a risk factor for heart disease. High levels of lipoproteins can increase the risk of heart disease. The test is done to check your risk of atherosclerosis, stroke, and heart attack.
*Important Information on Lab Test Processing Times: Ulta Lab Tests is committed to informing you about the processing times for your lab tests processed through a national lab. Please note that the estimated processing time for each test, indicated in business days, is based on data from the past 30 days across the 13 laboratories for each test. These estimates are intended to serve as a guide and are not guarantees. Factors such as laboratory workload, weather conditions, holidays, and the need for additional testing or maintenance can influence actual processing times. We aim to offer estimates to help you plan accordingly. Please understand that these times may vary, and processing times are not guaranteed. Thank you for choosing Ulta Lab Tests for your laboratory needs.

The Remnant & Particle Burden Panel panel contains 6 tests with 10 biomarkers .

The Remnant & Particle Burden Panel is a comprehensive, advanced cardiovascular and cardiometabolic assessment designed to evaluate lipid-related risk at the particle and inflammatory level. Rather than focusing solely on cholesterol totals, this panel examines how many atherogenic particles are circulating, how efficiently triglyceride-rich remnants are cleared, and whether inflammation or inherited lipoprotein factors are contributing to vascular risk.

Traditional lipid panels provide essential baseline information but can leave important risk drivers unrecognized—particularly remnant lipoproteins, genetically determined particles, and inflammatory burden. This panel expands standard testing by integrating a full Lipid Panel with apolipoprotein C-III (ApoC-III), apolipoprotein B (ApoB), Direct LDL, high-sensitivity C-reactive protein (hs-CRP), and Lipoprotein (a). Together, these markers offer a multidimensional view of lipid particle number, particle behavior, clearance efficiency, and inflammatory activity.

Remnant particles, which arise during triglyceride metabolism, are cholesterol-rich and highly atherogenic. ApoC-III is a key regulator that slows the breakdown and clearance of these particles, increasing their persistence in circulation. ApoB provides a direct count of atherogenic particles, including LDL, remnant lipoproteins, and Lipoprotein (a). hs-CRP adds insight into low-grade inflammation that can accelerate plaque development, while Lipoprotein (a) reflects inherited cardiovascular risk that is not captured by standard cholesterol measurements. Direct LDL ensures accurate LDL assessment when triglycerides or metabolic factors may distort calculated values.

The Remnant & Particle Burden Panel is well suited for individuals with complex or discordant lipid profiles, elevated triglycerides, family history of cardiovascular disease, or ongoing risk despite acceptable LDL cholesterol. By evaluating particle number, remnant burden, and inflammation together, this panel supports a deeper and more precise understanding of cardiovascular risk biology.

When and Why Someone Would Order This Panel

Residual Cardiovascular Risk Beyond Standard Lipids

Many individuals show cardiovascular risk that is not fully explained by total cholesterol or LDL cholesterol alone. This panel is often ordered when there is concern about “residual risk,” especially in people whose standard lipid panel appears acceptable but whose clinical picture suggests additional contributors. ApoB and ApoC-III help identify hidden particle burden and remnant-driven risk that traditional testing may miss.

Elevated Triglycerides or Mixed Dyslipidemia

Persistent or intermittent triglyceride elevation can complicate lipid interpretation and mask underlying particle abnormalities. The Remnant & Particle Burden Panel helps clarify whether triglyceride-rich remnants, impaired clearance, or elevated atherogenic particle number are driving abnormal results. This is particularly useful in mixed dyslipidemia, where LDL cholesterol alone does not reflect total risk.

Family History of Premature Cardiovascular Disease

A strong family history of early cardiovascular events often prompts more advanced lipid evaluation. Lipoprotein (a) and ApoB provide insight into inherited particle-related risk that is not strongly influenced by lifestyle and may remain undetected on routine lipid testing.

Metabolic and Inflammatory Risk Evaluation

Insulin resistance, metabolic syndrome, and related conditions are commonly associated with remnant accumulation and chronic low-grade inflammation. hs-CRP adds important context by identifying inflammatory activity that may amplify the vascular impact of lipid abnormalities.

Advanced Prevention and Longitudinal Monitoring

Healthcare providers may use this panel in preventive care strategies or longitudinal monitoring when a detailed understanding of lipid particle dynamics and inflammation is desired. Repeated testing can help track changes in particle burden and inflammatory markers over time.

What Does the Panel Measure

Lipid Panel

The Lipid Panel includes triglycerides, HDL cholesterol, LDL cholesterol, non-HDL cholesterol, and the cholesterol-to-HDL ratio. These measurements establish baseline lipid concentrations and provide context for advanced particle markers.

Apolipoprotein C-III (ApoC-III)

ApoC-III is a regulatory protein that inhibits triglyceride breakdown and slows hepatic clearance of triglyceride-rich lipoproteins. Elevated levels are associated with increased remnant particle persistence and heightened cardiovascular risk.

Apolipoprotein B (ApoB)

ApoB represents the total number of atherogenic lipoprotein particles in circulation. Each LDL, remnant particle, and Lipoprotein (a) particle contains one ApoB molecule, making ApoB a direct measure of particle burden rather than cholesterol content.

Direct LDL

Direct LDL provides an accurate measurement of LDL cholesterol without reliance on calculation formulas. This is especially important when triglycerides are elevated or when metabolic conditions may affect calculated LDL accuracy.

High-Sensitivity C-Reactive Protein (hs-CRP)

hs-CRP is a sensitive marker of systemic and vascular inflammation. Elevated levels are associated with increased risk of atherosclerosis progression and cardiovascular events.

Lipoprotein (a)

Lipoprotein (a) is a genetically determined lipoprotein particle associated with increased atherosclerotic and thrombotic risk. Levels are largely independent of lifestyle factors and standard lipid measures.

How Patients and Healthcare Providers Use the Results

Assessing Atherogenic Particle Burden

ApoB results help quantify the total number of atherogenic particles, while ApoC-III provides insight into remnant particle persistence. Together, these markers clarify whether cholesterol-related risk is driven by particle number, impaired clearance, or both.

Refining Cardiovascular Risk Stratification

By integrating lipid concentrations, particle metrics, and inflammation, this panel supports more refined cardiovascular risk stratification—particularly in individuals with discordant or borderline standard lipid results.

Supporting Evaluation of Contributing Conditions

Results may support evaluation of hypertriglyceridemia, metabolic syndrome, insulin resistance, inherited lipid disorders, chronic inflammatory states, and overall atherosclerotic cardiovascular disease risk.

Monitoring Trends Over Time

Tracking changes in ApoB, ApoC-III, hs-CRP, and lipid values over time can help assess shifts in particle burden and inflammatory activity, providing insight into evolving cardiometabolic patterns.

The Remnant & Particle Burden Panel offers a biologically informed, advanced approach to cardiovascular risk assessment. By combining traditional lipid measurements with markers of particle number, remnant metabolism, inflammation, and inherited risk, this panel moves beyond surface-level cholesterol values to illuminate the mechanisms driving atherogenic burden.

Used within a broader clinical context, the panel supports clearer interpretation of complex lipid profiles and deeper understanding of cardiometabolic health. Its strength lies in integrating particle quantity, particle behavior, and inflammatory signaling to provide meaningful insight into long-term vascular risk.

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