Lp(a): the hereditary heart-risk marker your doctor rarely measures

Lipoprotein a, or Lp(a) for short, is a heart-risk marker that is largely genetically determined. Your value is essentially fixed from childhood and barely changes for the rest of your life. That is why some people choose to have Lp(a) measured once, while a doctor rarely requests this marker by default.

I find Lp(a) a fascinating data point: it tells you something about your predisposition that your ordinary cholesterol values do not show.

Below you will read what Lp(a) actually is, which value is elevated and what to do if it comes back high. If you want the full picture first, read the guide on cholesterol blood values.

What is Lp(a)?

Lp(a) is a special type of LDL particle with an extra protein wrapped around it, called apo(a). That extra protein makes the particle stickier and possibly more harmful to your artery wall. Unlike ordinary LDL or ApoB, your Lp(a) value is almost entirely determined by your genes, not your lifestyle.

According to the Hartstichting, hereditary predisposition plays a large role in cardiovascular disease. Lp(a) is a clear example: you largely inherit your value from your parents.

The difference with other markers is therefore simple. You can do ldl cholesterol lowering with food and exercise, but your Lp(a) barely responds to it.

What is a normal Lp(a) value?

An Lp(a) value below roughly 75 nmol/l is often seen as low risk, while values above 125 nmol/l are considered clearly elevated. In between lies a grey zone. These limits are indicative: a doctor always reads your value together with your other risk factors.

Lp(a) is best reported in nmol/l, because that counts the number of particles. The older unit mg/dl measures mass and is harder to compare between laboratories.

The table below shows commonly used reference values in nmol/l. Treat them as a rough orientation, not a diagnosis.

If you want to read your Lp(a) next to your ordinary lipids, the lipid panel helps. The details per marker are on the page about Lp(a).

Can you lower your Lp(a)?

Lowering your Lp(a) mostly does not work through lifestyle. Food, exercise and weight, unlike with LDL, do little to it. With a high value you therefore focus on your other risk factors: those you can influence, and together they determine your total risk.

That sounds frustrating, but it is also freeing. You do not have to fixate on a number that barely moves anyway.

What does help are the levers you have a grip on:

• Lower LDL and ApoB. The lower your particle count, the less your artery wall is burdened.
• Keep an eye on blood pressure. A healthy blood pressure eases the load on your vessels.
• Do not smoke. Smoking speeds up damage to the artery wall.
• Move and weight. Both support a more favourable profile.

The marker ApoB counts the number of harmful particles and, together with your Lp(a), gives a richer picture of your risk.

When is testing Lp(a) interesting?

Lp(a) is especially interesting if cardiovascular disease occurs at a young age in your family. Because the value is hereditary and stays stable for life, some people choose to have it measured once. A single measurement then gives a picture that in practice does not change again.

Family history is the main signal. If a parent or sibling had an early heart attack, your own Lp(a) may partly be behind it.

A large study by Kamstrup and colleagues showed that genetically elevated Lp(a) is associated with a higher risk of heart attack. That underlines why the predisposition behind this number counts.

What you do with the result depends on the whole picture. A high Lp(a) is not a diagnosis: it is one piece of your risk puzzle that you lay together with a doctor.

What do you do with a high Lp(a)?

With a high Lp(a) you focus on everything you can steer. Lower your LDL and ApoB, keep your blood pressure healthy, do not smoke and keep moving. That way you reduce your total risk, even though your Lp(a) itself stays high. The number is a reason for sharpness, not a reason for panic.

A review by Nordestgaard and colleagues describes Lp(a) as an independent risk factor alongside your ordinary lipids. That means it adds something to the story LDL and ApoB already tell.

My advice: see a high Lp(a) as a signal to get your influenceable risk factors firmly in order. Discuss your total risk afterwards with your GP, who can weigh your whole profile and decide the next step together with you.

Sources

1. Hartstichting. Erfelijke belasting en hart- en vaatziekten. Geraadpleegd 2026.
2. Kamstrup PR, Tybjaerg-Hansen A, Steffensen R, Nordestgaard BG. Genetically elevated lipoprotein(a) and increased risk of myocardial infarction. JAMA. 2009;301(22):2331-2339. PMID: 19509380.
3. Nordestgaard BG, Chapman MJ, Ray K, et al. Lipoprotein(a) as a cardiovascular risk factor: current status. Eur Heart J. 2010;31(23):2844-2853. PMID: 20965889.

Disclaimer

Every blood test result includes a professional assessment from a BIG-registered doctor. This article is general information and is not a substitute for medical advice. A blood test is a tool to help you have a better-informed conversation with your GP, not a diagnosis in itself. For treatment decisions, discuss your results with your GP.