What Is Lipoprotein(a), and Should You Have It Tested?

Published: 12 October 2026
Next Review Due: 12 October 2027

Lipoprotein(a) — often written as Lp(a) — is a type of lipoprotein particle in the blood that carries cholesterol. Unlike LDL cholesterol, which is influenced by diet and lifestyle, Lp(a) levels are largely determined by genetics. Elevated Lp(a) is recognised as an independent cardiovascular risk factor, meaning it can raise the risk of heart disease even when other cholesterol levels appear normal. Understanding whether an Lp(a) blood test might be appropriate depends on personal and family history, and any result should be interpreted in the context of your overall cardiovascular profile.

Quick Answer: Lipoprotein(a) is a genetically inherited particle that can raise cardiovascular risk independently of standard cholesterol. A single blood test can measure it. It is particularly worth discussing with a clinician if you have a family history of early heart disease, raised cholesterol, or cardiovascular events despite normal-looking lipid results. A result alone does not diagnose heart disease.

In brief:

• Lp(a) levels are mostly genetic and do not respond significantly to most lifestyle changes
• Elevated Lp(a) is associated with increased risk of coronary artery disease and stroke
• A standard lipid panel does not include Lp(a); a separate test is needed
• Testing may be especially relevant for those with a personal or family history of premature cardiovascular disease
• An elevated result does not confirm heart disease — clinical assessment is needed to understand the full picture

What Exactly Is Lipoprotein(a)?

Lipoprotein(a) is a low-density lipoprotein (LDL) particle bound to an additional protein called apolipoprotein(a). This structural difference makes Lp(a) particularly relevant to heart health: it is thought to promote the build-up of fatty deposits in arterial walls, encourage clot formation, and contribute to inflammation within blood vessels — all of which are mechanisms associated with cardiovascular disease.

Crucially, Lp(a) is not routinely included in the standard lipid panels offered through NHS or private health screening. Most people who have their "cholesterol checked" receive measurements of total cholesterol, LDL, HDL, and triglycerides. Lp(a) requires a separate, specific test request.

Levels of Lp(a) in the blood are approximately 80–90% determined by genetics, specifically by variations in the LPA gene. This means that, unlike LDL cholesterol, Lp(a) does not fall significantly in response to dietary change or exercise. This genetic basis is important: it explains why some individuals develop cardiovascular disease despite having a healthy lifestyle and otherwise unremarkable cholesterol levels.

Why Does Elevated Lp(a) Matter for Heart Health?

High Lp(a) is classified as an independent risk factor for cardiovascular disease. Research, including large-scale population studies and Mendelian randomisation analyses, has consistently found an association between elevated Lp(a) and increased risk of coronary artery disease, myocardial infarction (heart attack), aortic valve disease, and ischaemic stroke.

The European Society of Cardiology and the European Atherosclerosis Society have both recommended that Lp(a) be measured at least once in an adult's lifetime to identify those at higher inherited risk. In the UK, clinical awareness of Lp(a) has grown, and national guidance on cardiovascular risk assessment is increasingly acknowledging its significance.

It is important to note that elevated Lp(a) does not mean a heart attack is inevitable. It is one piece of a broader cardiovascular risk picture that includes blood pressure, smoking status, diabetes, physical activity, weight, age, sex, and other lipid levels. A clinician uses all of these factors together when assessing overall risk. If you have concerns about your cardiovascular risk profile, information about specialist cardiology assessment for high lipoprotein(a) risk in London is available.

Should You Have a Lipoprotein(a) Test?

A lipoprotein(a) blood test is particularly worth discussing with a healthcare professional in the following circumstances:

Family history of early heart disease. If a close relative — particularly a parent or sibling — suffered a heart attack, stroke, or underwent cardiac intervention before the age of 60, elevated Lp(a) may be a contributing inherited factor worth investigating.

Familial hypercholesterolaemia (FH). People diagnosed with FH — a genetic condition causing high LDL cholesterol — are also at elevated risk of having raised Lp(a). The two conditions can occur together and compound cardiovascular risk.

Cardiovascular disease despite a healthy lifestyle. If someone develops coronary artery disease, has a heart attack, or requires a procedure such as bypass surgery or stenting at a relatively young age and in the absence of obvious risk factors, an Lp(a) test may help explain why.

Unexpectedly high cardiovascular risk scores. If a routine risk assessment suggests higher-than-expected cardiovascular risk despite apparently well-controlled cholesterol and blood pressure, Lp(a) may be a contributing factor.

Recurrent cardiovascular events. For individuals who have already experienced a cardiac event and want to understand their residual risk more thoroughly, Lp(a) testing may offer additional clinical information.

A test on its own does not diagnose heart disease or determine treatment. Understanding your Lp(a) result requires clinical context. A specialist such as a consultant cardiologist can help interpret an elevated result within the broader context of your cardiovascular health, medical history, and appropriate investigations.

What Can a Cardiovascular Blood Test Show — and What Can It Not?

A lipoprotein(a) blood test is a straightforward measurement taken from a blood sample. The result is usually reported in mg/dL or nmol/L. There is currently some variation in the cut-off values used to define "elevated" Lp(a), though many guidelines consider levels above 50 mg/dL (approximately 125 nmol/L) as clinically significant.

What a test can show:

• Whether your Lp(a) level falls within a range associated with higher cardiovascular risk
• Whether inherited risk factors may partially explain your overall cardiovascular profile
• Whether further clinical review might be helpful

What a test cannot establish on its own:

• Whether you have heart disease
• Your precise individual risk of a future cardiovascular event
• Whether immediate treatment is needed

A blood test result is best understood alongside a full clinical assessment. For those whose results suggest elevated risk, a referral for further evaluation — potentially including CT coronary angiogram scan and advanced cardiac testing pathways — may be appropriate, depending on the clinician's findings.

What Might a Cardiologist Investigate?

If an Lp(a) result is elevated or your overall cardiovascular risk warrants further review, a consultant cardiologist may consider a range of investigations. The appropriate tests depend entirely on the individual — their symptoms, medical history, family history, and clinical examination findings.

Investigations a cardiologist might consider include:

• Electrocardiogram (ECG): A recording of the heart's electrical activity, which can detect certain rhythm disturbances or signs of previous cardiac events
• Echocardiogram: An ultrasound of the heart used to assess its structure and function, including valve health — relevant given that elevated Lp(a) is associated with aortic valve disease
• Blood-pressure monitoring: Ambulatory monitoring over 24 hours provides a more complete blood-pressure profile than a single reading
• CT coronary angiography: An imaging test that can assess the coronary arteries for narrowing or calcification
• Stress testing or cardiac MRI: Used in appropriate clinical contexts to assess how the heart functions under physical demand or to characterise cardiac tissue

Not everyone with an elevated Lp(a) result needs all of these tests. The clinician determines which investigations are clinically appropriate based on the full picture. You can read more about consultant cardiologist profile and specialist heart risk review approach at Cardiologist London.

Supporting Cardiovascular Health When Lp(a) Is Elevated

Because Lp(a) levels are largely genetic and do not respond meaningfully to most lifestyle interventions, the clinical approach for people with elevated Lp(a) typically focuses on managing all other modifiable cardiovascular risk factors as effectively as possible. General evidence-based principles include:

• Keeping LDL cholesterol well controlled, as LDL and Lp(a) both contribute to arterial plaque build-up
• Not smoking, which independently multiplies cardiovascular risk
• Managing blood pressure, ideally through a combination of appropriate lifestyle measures and, where necessary, medication prescribed by a clinician
• Maintaining a healthy weight and physical activity level, both of which support overall cardiovascular health
• Limiting alcohol to within recommended UK guidance levels
• Managing blood glucose, particularly for those with diabetes or insulin resistance

Novel treatments specifically targeting Lp(a) — including RNA-based therapies currently in clinical trials — are an active area of cardiovascular research. These are not yet widely available, and their use would be determined by a specialist. Do not start, stop or change any prescribed medication without guidance from the clinician responsible for your care.

When to Seek Emergency Help

This article covers a cardiovascular risk factor identified through testing, rather than an acute symptom. However, if you experience any of the following, call 999 immediately:

• Sudden chest pain or pressure, particularly if it does not settle within a few minutes
• Pain or discomfort spreading to the arm, jaw, neck, back, or stomach
• Chest discomfort accompanied by sweating, nausea, or breathlessness
• Sudden and severe shortness of breath
• Collapse or loss of consciousness
• Sudden weakness or numbness on one side of the body
• Sudden difficulty speaking or understanding speech
• Sudden facial weakness or drooping

Do not drive yourself to hospital. Do not wait to see whether symptoms improve. These may be signs of a heart attack or stroke.

For health concerns that are not immediately life-threatening but need prompt attention, contact NHS 111 or your GP.

Frequently Asked Questions

Is an Lp(a) test available on the NHS?

Lp(a) testing is not routinely offered through standard NHS health checks, though it may be requested by a specialist in appropriate clinical circumstances — for example, for individuals with familial hypercholesterolaemia or unexplained cardiovascular disease. It is available privately through specialist cardiology services and some private blood-test providers. Always confirm current availability and cost directly with the provider.

Can I lower my Lp(a) level through diet or exercise?

Unlike LDL cholesterol, Lp(a) levels are determined predominantly by genetics and do not decrease meaningfully with most dietary changes or exercise. Some prescription medications, including niacin and PCSK9 inhibitors, can reduce Lp(a) to varying degrees, but their use in this context would be determined by a specialist based on your overall cardiovascular risk. Novel Lp(a)-specific therapies are in clinical trials but are not yet routinely prescribed.

Does having a high Lp(a) mean I will have a heart attack?

No. Elevated Lp(a) is one independent risk factor among several. Many people with raised Lp(a) do not develop serious cardiovascular disease, particularly when other risk factors — such as blood pressure, LDL cholesterol, and smoking — are well managed. An elevated result should prompt a thorough cardiovascular risk review, not alarm.

Should my children be tested if I have high Lp(a)?

Because Lp(a) is largely inherited, close relatives — including children — of someone with significantly elevated Lp(a) may also have raised levels. Whether and when to test family members is a clinical decision best discussed with an appropriate healthcare professional or specialist.

What is the difference between Lp(a) and LDL cholesterol?

Both are lipoprotein particles that carry cholesterol through the bloodstream. LDL cholesterol is influenced by diet, weight, and lifestyle, as well as genetics. Lp(a) is a distinct particle with an additional protein component, and its level is almost entirely genetically determined. They contribute to cardiovascular risk through related but partly different mechanisms.

Who should I speak to about an elevated Lp(a) result?

Start with your GP, who can help contextualise the result within your overall health picture and consider whether onward referral is appropriate. If your result is significantly elevated, if you have a family history of premature heart disease, or if you already have established cardiovascular disease, a referral to a consultant cardiologist may be beneficial. Further information about specialist cardiovascular consultations is available through the Cardiologist London website.

Further Specialist Information

Cardiologist London publishes patient information about cardiovascular conditions, cardiac investigations, and specialist assessments. The website is associated with consultant cardiologist Dr Ravi Assomull and covers a broad range of topics relevant to heart health, including cardiovascular risk factor guidance for long-term heart disease prevention and the specialist investigations used to assess them. This is an external specialist resource, separate from GP.London.

If you are concerned about your cardiovascular risk or have received a result that you would like to understand more fully, speaking with an appropriate healthcare professional is always the right first step.

This article provides general information and does not constitute individual medical advice, diagnosis or treatment. Cardiovascular symptoms can have several possible causes and should be assessed according to individual circumstances. Seek advice from an appropriate healthcare professional if symptoms persist or worsen. Call 999 immediately if you may be experiencing a heart attack, stroke or another medical emergency.

Next Review Due: 12 October 2027