Normal Cholesterol but Family Heart Disease? Lipoprotein(a) Explained

?Written by: London Blood Tests Editorial Team

Published: 31st of July

A reassuring cholesterol result does not always tell the whole story—particularly when heart attacks or strokes have occurred unusually early within a family.

One risk factor that may not appear on a routine cholesterol report is Lipoprotein(a), usually abbreviated to Lp(a). It is an inherited, cholesterol-carrying particle associated with atherosclerotic cardiovascular disease and calcific aortic valve stenosis.

Lp(a) is not normally included automatically in a conventional cholesterol profile. A person can therefore have acceptable total cholesterol, LDL cholesterol and triglyceride results while still having a raised Lp(a) concentration.

A separate Lipoprotein(a) blood test is required to measure it.

Lipoprotein(a) at a glance

• Lp(a) is an LDL-like cholesterol-carrying particle.

• Its concentration is determined predominantly by genetics.

• It is not normally included in a standard cholesterol profile.

• A satisfactory cholesterol result does not exclude raised Lp(a).

• Higher concentrations are associated with increased cardiovascular risk.

• Lp(a) is also associated with calcific aortic valve stenosis.

• European guidance recommends considering one measurement during adult life.

• Testing is particularly relevant where cardiovascular disease has occurred prematurely within a family.

• Lp(a) usually remains relatively stable, so annual testing is not normally necessary.

• Diet and exercise generally have limited direct effects on the Lp(a) concentration.

• Managing LDL cholesterol and other modifiable risk factors remains important when Lp(a) is elevated.

The 2025 ESC/EAS dyslipidaemia update recommends considering Lp(a) measurement at least once during each adult’s lifetime. It also identifies Lp(a) above 50 mg/dL or above 105 nmol/L as a cardiovascular risk modifier.

What is Lipoprotein(a)?

Cholesterol and other fats cannot travel freely through the blood. They are transported inside particles called lipoproteins.

Lp(a) consists of:

• An LDL-like particle

• One apolipoprotein B-100 molecule

• An additional protein called apolipoprotein(a)

The attached apolipoprotein(a) distinguishes Lp(a) from an ordinary LDL particle.

Higher Lp(a) concentrations are associated with atherosclerotic cardiovascular disease, including coronary heart disease, heart attack, ischaemic stroke and peripheral arterial disease. The European Atherosclerosis Society’s Lp(a) consensus statement also recognises elevated Lp(a) as a causal risk factor for aortic valve stenosis.

An Lp(a) blood test does not show whether an artery is already narrowed. Nor can it predict with certainty whether a heart attack or stroke will occur. It identifies one factor that may increase a person’s overall cardiovascular risk.

Why can Lp(a) be high when cholesterol is normal?

A conventional cholesterol profile and an Lp(a) test answer different questions.

The London Blood Tests Cholesterol Lipid Profile provides the standard cholesterol and triglyceride measurements used to assess cardiovascular health, including:

• Total cholesterol

• HDL cholesterol

• LDL cholesterol

• Triglycerides

• Non-HDL cholesterol

• Cholesterol ratios

These results remain important, but they do not automatically reveal the amount of Lp(a) in the blood.

Someone may therefore have:

• Acceptable LDL cholesterol but raised Lp(a)

• Raised LDL cholesterol but a lower Lp(a) concentration

• Both LDL cholesterol and Lp(a) elevated

• Both results within their expected ranges

Each pattern has a different clinical meaning.

HEART UK’s Lipoprotein(a) guidance confirms that Lp(a) is not routinely measured during an ordinary cholesterol test in UK general practice.

Does Lp(a) affect the LDL cholesterol result?

Lp(a) contains cholesterol, and part of that cholesterol may be included in the laboratory’s reported LDL-C result.

However, an LDL cholesterol result cannot show:

• How much of the reported LDL-C comes from Lp(a)

• How many Lp(a) particles are circulating

• Whether the Lp(a) concentration itself is elevated

A separate Lp(a) measurement is needed.

Is Lipoprotein(a) inherited?

Yes. Lp(a) concentration is determined largely by variations in the LPA gene.

A person can inherit a tendency towards a higher concentration from one or both parents. A significantly elevated result may therefore have implications for:

• Parents

• Brothers and sisters

• Children

The concentration generally changes relatively little throughout adult life. This is why testing first-degree relatives may be considered when someone has markedly raised Lp(a) or premature cardiovascular disease appears within the family.

HEART UK explains that Lp(a) is mainly genetically determined and is usually unaffected by diet, lifestyle or environmental factors. It also recommends considering family screening when raised Lp(a) has been identified.

Family history alone does not identify the cause of early cardiovascular disease. Other possibilities include:

• Familial hypercholesterolaemia

• Raised LDL cholesterol

• High blood pressure

• Diabetes

• Smoking

• Kidney disease

• Several inherited and environmental factors acting together

Lp(a) should therefore be assessed as one part of a broader cardiovascular evaluation.

What does premature cardiovascular disease mean?

The 2025 ESC/EAS guidance defines a family history of premature cardiovascular disease as cardiovascular disease occurring:

• Before age 55 in men

• Before age 60 in women

Individual UK services may apply slightly different definitions, but the ages at which relatives experienced cardiovascular events remain clinically important.

Relevant family events may include:

• A father or brother having a heart attack before age 55

• A mother or sister developing cardiovascular disease before age 60

• A close relative having an early ischaemic stroke

• Several relatives requiring coronary stents or bypass surgery unusually early

• Known familial hypercholesterolaemia

• Calcific aortic valve stenosis within the family

• A first-degree relative known to have substantially raised Lp(a)

Record the relative’s relationship to you, the condition they experienced and their approximate age at diagnosis.

Who should consider an Lp(a) blood test?

European guidance supports considering one Lp(a) measurement during adulthood.

Testing may be particularly informative for someone with:

• A personal history of premature cardiovascular disease

• A family history of premature heart attack or stroke

• Familial hypercholesterolaemia

• A first-degree relative with raised Lp(a)

• Calcific aortic valve stenosis

• Cardiovascular disease that appears disproportionate to routine cholesterol results

• Recurrent cardiovascular events despite controlled LDL cholesterol

• A cardiovascular-risk assessment close to a treatment threshold

HEART UK particularly highlights premature cardiovascular disease, inherited lipid disorders, calcific aortic valve disease and first-degree relatives of people with substantially elevated Lp(a).

Should every adult be tested?

The ESC/EAS recommends considering one measurement during adult life. UK pathways are less consistent, however, and Lp(a) is not yet incorporated uniformly into routine NICE and NHS cardiovascular assessments.

Private testing may be considered where the result is clinically relevant, particularly when a routine cholesterol profile does not appear to explain the family or personal history.

How are Lp(a) results reported?

Lp(a) may be reported in:

• Nanomoles per litre: nmol/L

• Milligrams per decilitre: mg/dL

• Occasionally milligrams per litre: mg/L

These units measure different properties.

Nanomoles per litre relate more closely to particle concentration, while milligrams per decilitre measure the mass of Lp(a). Because the size of apolipoprotein(a) varies between individuals, there is no single universally reliable formula for converting an individual result between mg/dL and nmol/L.

Always check the unit printed on the laboratory report before interpreting the number.

What Lp(a) level is considered elevated?

The 2025 ESC/EAS update uses the paired risk-modifier thresholds of:

• More than 50 mg/dL; or

• More than 105 nmol/L

These are paired guideline thresholds—not a conversion formula.

Cardiovascular risk rises progressively as Lp(a) increases. There is no sharp boundary at which every result below one number is harmless and every result above it is dangerous.

The result must be considered alongside:

• LDL and non-HDL cholesterol

• Blood pressure

• Smoking

• Diabetes

• Kidney function

• Age

• Family history

• Existing cardiovascular disease

• Current treatment

A moderately elevated result may be particularly relevant when someone is already close to a treatment threshold or has additional cardiovascular risk factors.

Is Lp(a) the same as LDL cholesterol?

No.

LDL cholesterol remains a principal treatment target in cardiovascular prevention. Lp(a) provides separate information about inherited risk and does not replace a standard lipid profile.

Is Lp(a) the same as ApoB?

No.

Every Lp(a) particle contains one ApoB molecule. ApoB is also found on several other atherogenic particles, including:

• LDL

• VLDL

• Intermediate-density lipoproteins

• Remnant particles

An ApoB test estimates the total number of ApoB-containing particles. An Lp(a) test measures the concentration of the specific Lp(a) particle.

ApoB cannot reveal how much of the overall particle burden is due to Lp(a). Lp(a), meanwhile, does not replace the broader information provided by ApoB or a full cholesterol profile.

Can diet and exercise lower Lp(a)?

Diet and exercise usually have limited direct effects on Lp(a) because its concentration is predominantly genetically determined.

This does not mean lifestyle is unimportant.

A heart-supportive diet, regular physical activity, avoiding smoking, maintaining a healthy weight and controlling blood pressure can improve other cardiovascular risks. This becomes especially important when an inherited factor cannot be changed substantially through lifestyle alone.

The aim is to reduce overall cardiovascular risk—not simply one laboratory number.

What happens if Lp(a) is elevated?

A raised result should prompt a review of the wider cardiovascular-risk profile.

A healthcare professional may assess:

• A full cholesterol lipid profile

• LDL and non-HDL cholesterol

• Blood pressure

• Smoking

• Blood glucose or HbA1c

• Kidney function

• Existing cardiovascular disease

• Family history

• Current medication

• Possible familial hypercholesterolaemia

Management may involve:

• More intensive LDL-cholesterol reduction

• Blood-pressure treatment

• Diabetes prevention or management

• Smoking cessation

• Dietary and physical-activity changes

• Referral to a cardiologist or lipid specialist

• Testing appropriate family members

NICE cardiovascular guidance focuses on assessing overall cardiovascular risk and managing modifiable factors, including cholesterol, blood pressure, diabetes and smoking.

Do not begin aspirin, statins or other cardiovascular medicines solely because of a private Lp(a) result. Medication decisions require an individual clinical assessment.

Is there a treatment specifically for high Lp(a)?

As of July 2026, there is no established, routinely commissioned UK medicine prescribed solely to reduce Lp(a)-related cardiovascular events.

NICE’s appraisal of pelacarsen for people with established cardiovascular disease and raised Lp(a) remains at the “awaiting development” stage, with its publication date still to be confirmed.

Treatment therefore focuses primarily on reducing risks that can be modified, especially:

• LDL cholesterol

• High blood pressure

• Smoking

• Diabetes

• Physical inactivity

Lp(a)-targeted treatments are developing rapidly. Anyone with markedly elevated Lp(a), established cardiovascular disease or a significant family history should discuss current options with a lipid specialist.

Does Lp(a) need to be tested more than once?

Usually not.

Lp(a) is largely genetically determined and generally remains relatively stable. The Gloucestershire Hospitals NHS Lp(a) laboratory guidance states that there is usually no indication for repeat testing.

A repeat measurement may occasionally be considered:

• If the original result was unexpected or uncertain

• If significant illness may have affected the first measurement

• After a major biological change

• When a specialist requires confirmation for management

Routine annual testing is not normally necessary.

Do you need to fast for an Lp(a) test?

No specific preparation is normally required for an isolated Lp(a) test. NHS laboratory guidance confirms that no special patient preparation is needed.

Fasting may occasionally be requested when:

• Triglycerides were previously very high or difficult to interpret

• Glucose or insulin is being tested under fasting conditions

• A clinician requires a directly comparable fasting sample

• The laboratory has provided specific preparation instructions

A routine cholesterol profile does not automatically require fasting.

Continue prescribed medicines unless a healthcare professional has advised otherwise.

Should Lp(a) be measured with a cholesterol profile?

Often, yes.

The Lipoprotein(a) blood test measures the inherited Lp(a) concentration.

The Cholesterol Lipid Profile provides the standard cholesterol and triglyceride measurements needed to interpret Lp(a) within the wider cardiovascular picture.

Testing both can answer two separate questions:

1. What does the conventional cholesterol profile show?

2. Is there an additional inherited Lp(a)-related risk?

Lp(a) does not replace a cholesterol profile, and a cholesterol profile does not normally include Lp(a).

Before booking your Lp(a) test

To make the result easier to interpret:

• Bring previous cholesterol and cardiovascular blood-test results.

• Record which relatives experienced heart attacks, strokes or aortic valve disease.

• Note their approximate ages when the conditions occurred.

• Mention known familial hypercholesterolaemia.

• Tell the provider about current cholesterol-lowering medicines.

• Confirm whether a cholesterol profile is being collected at the same appointment.

• Ask which unit the laboratory will use.

• Arrange clinical interpretation if the result is elevated.

The NHS laboratory guidance asks clinicians to include the reason for testing, relevant family history and current lipid-lowering medication with the request.

Where can you arrange an Lp(a) blood test in London?

Private Lp(a) and cholesterol blood testing is available through London Blood Tests partner clinics in:

• Knightsbridge: Astrum Medical, 43 Cheval Place, SW7 1EW

• Holborn: GB MedLabs, 1 Portpool Lane, EC1N 7UU

• Paddington: Dr Ducu Clinics, 199 Gloucester Terrace, W2 6LD

• Gants Hill, Ilford: Olive Health, 23A Seven Ways Parade, IG2 6JX

Home and hotel collection may also be available, subject to location and appointment availability. London Blood Tests states that medical interpretation and doctor follow-up can be requested. (London Blood Tests: About us)

Before booking, check:

• Whether Lp(a) is being ordered separately

• Whether a cholesterol lipid profile is also needed

• Which reporting unit the laboratory uses

• Whether any accompanying tests require fasting

• The current turnaround time

• Whether professional interpretation is included or available separately

When should you speak to a doctor?

Arrange a clinical review if:

• Lp(a) is above the laboratory range or guideline risk threshold.

• The result is substantially elevated.

• A close relative had cardiovascular disease prematurely.

• You have already had a heart attack, stroke or peripheral arterial disease.

• You have familial hypercholesterolaemia.

• LDL or non-HDL cholesterol is also raised.

• You have diabetes, kidney disease or high blood pressure.

• Several close relatives may need advice about testing.

A raised result is not a prediction that a cardiovascular event will definitely occur. It identifies an additional risk factor that may justify earlier or more intensive management of the factors that can be changed.

Frequently asked questions

Can Lp(a) be high if my cholesterol is normal?

Yes. Lp(a) is not normally included in a conventional cholesterol profile and may be elevated even when total cholesterol, LDL cholesterol and triglycerides appear acceptable.

Does a standard cholesterol test include Lp(a)?

Usually not. Lp(a) normally needs to be requested as a separate blood test.

Is Lipoprotein(a) inherited?

Yes. Its concentration is determined predominantly by genetics and generally remains relatively stable throughout adulthood.

How often should Lp(a) be tested?

For most people, one measurement during adulthood is sufficient. Repeat testing is normally reserved for selected clinical circumstances.

Do I need to fast?

Fasting is not normally required for an isolated Lp(a) test.

Is a raised Lp(a) result a diagnosis of heart disease?

No. It is a cardiovascular risk marker and cannot show whether an artery is already narrowed.

Can diet or exercise lower Lp(a)?

They usually have limited direct effects on the Lp(a) concentration. They remain important because they can reduce other components of cardiovascular risk.

Should relatives be tested?

Testing first-degree relatives may be appropriate when Lp(a) is substantially elevated or premature cardiovascular disease appears within the family. A clinician or lipid specialist can advise.

Book a private Lipoprotein(a) blood test in London

London Blood Tests offers a standalone Lipoprotein(a) blood test and a conventional Cholesterol Lipid Profile through London clinics and home or hotel appointments.

A routine lipid profile remains important for assessing LDL cholesterol, HDL cholesterol, triglycerides and non-HDL cholesterol. Lp(a) provides separate information about inherited cardiovascular risk that ordinary cholesterol testing may not reveal.

An elevated result does not mean cardiovascular disease is inevitable. It can, however, provide a reason to assess the wider risk profile carefully, discuss family testing and manage modifiable risk factors earlier.

References

1. European Society of Cardiology: 2025 ESC/EAS dyslipidaemia update

2. European Atherosclerosis Society: Lipoprotein(a) consensus statement

3. HEART UK: High Lipoprotein(a)

4. Gloucestershire Hospitals NHS: Lipoprotein(a) test information

5. NICE: Cardiovascular disease risk assessment and lipid modification

6. NICE: Pelacarsen technology-appraisal project

Medical disclaimer: This article provides general educational information and does not replace individual cardiovascular assessment, diagnosis or treatment. Speak to a GP, cardiologist or lipid specialist about elevated Lp(a), abnormal cholesterol results, medication or a family history of premature cardiovascular disease.