lipid.siteLipoprotein(a): What a High Lp(a) Means
Lp(a), short for lipoprotein(a), is an inherited particle that raises the risk of heart attack, stroke, and aortic valve narrowing. Your genes set most of your level, a standard cholesterol test skips it, and one blood test tells you where you stand.
What is lipoprotein(a)?
Lp(a) (say it "L-P-little-a") looks like an LDL particle with an extra protein, apolipoprotein(a), attached. That protein makes the particle more likely to build plaque and promote blood clots.
Your genes set most of your level, and diet and exercise change it very little. You're born with your level, and it stays fairly stable through life.
What is a high Lp(a) level?
The National Lipid Association (2024) calls under 75 nmol/L (about 30 mg/dL) lower risk and 125 nmol/L (about 50 mg/dL) or higher high risk. The range between them is intermediate. The higher the level, the greater the risk.
Labs report Lp(a) in nmol/L or mg/dL. The two units don't convert cleanly because particle size varies from person to person, so compare your result with the cutoff in the same unit your lab used.
Why does a high Lp(a) matter?
A high Lp(a) adds risk of heart disease, stroke, and aortic valve disease on top of your other risk factors. Even with well-controlled LDL-C, a high Lp(a) still adds risk.
About 1 in 5 people have a level of 50 mg/dL (about 125 nmol/L) or higher, and most haven't been tested. A 2024 genetic analysis estimated that, particle for particle, Lp(a) is about 6 times as likely as LDL to cause coronary disease.
Who should get an Lp(a) test?
The 2026 ACC/AHA guideline recommends measuring Lp(a) at least once in every adult, in line with the European Atherosclerosis Society (2022) and the National Lipid Association (2024). Because the result rarely changes, one test gives lasting information.
Testing helps most if you have:
- A family history of early heart disease (before age 55 in men, 65 in women)
- Heart or blood vessel events despite well-controlled cholesterol
- A family member with known high Lp(a)
- Other risk factors where a fuller picture would guide treatment
Can you lower a high Lp(a)?
Diet and exercise don't lower it meaningfully, and no FDA-approved medicine targets Lp(a) yet. A high Lp(a) gives you and your clinician more reason to push LDL-C and ApoB lower to offset the extra risk.
PCSK9 inhibitors lower Lp(a) by roughly 20 to 30% as a side benefit (about 20 to 38% in pooled evolocumab studies). Statins don't lower Lp(a) and raised it slightly in a pooled analysis of six trials, but they lower LDL and ApoB, which lowers total risk. Ask your clinician what fits you.
Drugs built to lower Lp(a) directly are in outcome trials. In September 2026, Novartis announced that pelacarsen lowered Lp(a) but missed its main goal of reducing cardiovascular events. Results for the siRNA drugs are still pending.
Common questions
▸Should I take a statin if I have high Lp(a)?
Often, depending on your overall risk. Statins don't lower Lp(a), but they lower LDL and ApoB, which reduces total risk. Guidelines count high Lp(a) as a risk enhancer when risk is borderline or intermediate. Decide with your clinician.
▸Can you lower your Lp(a)?
Not meaningfully with diet or exercise, since genes set most of it. PCSK9 inhibitors lower it by roughly 20 to 30% as a side benefit. Drugs aimed at Lp(a) directly are still in outcome trials, and none is FDA-approved yet.
▸Why isn't Lp(a) part of a standard cholesterol test?
A standard panel measures total cholesterol, HDL, and triglycerides. Lp(a) is a separate test you order by name. The 2026 ACC/AHA guideline now recommends measuring it at least once in every adult.
▸Is Lp(a) genetic?
Yes. The LPA gene sets most of your level, and it stays fairly stable through life. One test is usually enough, and close relatives of someone with high Lp(a) are worth testing too.
▸Can you live a long life with high Lp(a)?
Yes, especially with early awareness and good control of every other risk factor. High Lp(a) raises risk, and your other numbers still shape the outcome.
Read next
- How to Get an ApoB and Lp(a) TestApoB and Lp(a) are separate blood tests you order by name. See how to ask, self-pay prices, insurance, fasting, and what to do with a high result.Read
- Familial Hypercholesterolemia: Signs and TreatmentFamilial hypercholesterolemia (FH) keeps LDL very high from birth and affects about 1 in 250 to 313 people. See the signs, diagnosis, and treatment.Read
- CAC Score: What Your Calcium Score MeansA CAC score measures calcified plaque in your heart arteries on a quick CT scan. See what 0, 100 to 399, and 400 or more mean, and who needs one.Read
See it on lipid.site
Sources
- Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement (2022), European Heart Journal
- A focused update to the 2019 NLA scientific statement on use of lipoprotein(a) in clinical practice (2024), Journal of Clinical Lipidology
- Lipoprotein(a) Is Markedly More Atherogenic Than LDL: An Apolipoprotein B-Based Genetic Analysis (2024), Journal of the American College of Cardiology
- Effect of Evolocumab on Non-HDL Cholesterol, ApoB, and Lipoprotein(a): pooled analysis (2020), Journal of the American Heart Association
- 2026 ACC/AHA multisociety guideline on the management of dyslipidemia, Journal of the American College of Cardiology
Not medical advice. General education from published trials and drug labels, last updated October 2026. lipid.site is not a healthcare provider and cannot tell you what to take or change. Talk to your clinician before starting or stopping any treatment. If you have chest pain or other signs of a heart attack or stroke, call 911.