High lipoprotein(a) — often called Lp(a) — is a genetic condition that raises your risk of heart attack and stroke. You inherit the level from your parents, and unlike cholesterol, it is not something you can lower with diet or exercise. The cause is your DNA, not your lifestyle. For most people, the level stays the same from birth to death, and the only way to know your number is to get a blood test.
What is Lipoprotein(a) and How is it Different from LDL?
Lipoprotein(a) looks a lot like LDL cholesterol — the “bad” cholesterol — but it has one extra protein attached to it. That protein is called apolipoprotein(a). This extra piece changes how the particle behaves in your body.
LDL cholesterol builds up in your artery walls. Lp(a) does the same thing, but it also promotes blood clotting and inflammation. This combination makes Lp(a) more dangerous than regular LDL at the same concentration. The particle is stickier and more likely to cause blockages.
Most people have never heard of Lp(a). Standard cholesterol panels do not include it. You need a separate blood test to measure it, and many doctors only order that test when someone has heart disease without obvious risk factors.
What Causes High Lipoproteina Levels?
The main cause of high Lp(a) is genetics. Your liver produces Lp(a) based on instructions from your genes. You have two copies of the LPA gene — one from each parent. The version you inherit determines your Lp(a) level.
Some versions of the gene produce high amounts of Lp(a). Others produce low amounts. This is not something you control. Your diet does not raise or lower Lp(a). Exercise does not change it. Weight loss does not reduce it.
If one parent has high Lp(a), you have about a 50% chance of having high levels too. If both parents have it, your level may be even higher. Family history of early heart attacks or strokes can be a clue that high Lp(a) runs in your family.
There is one exception to the “fixed for life” rule. Women who go through menopause may see their Lp(a) levels rise somewhat. The increase is usually modest, and the reason is not fully understood. Some research suggests estrogen affects Lp(a) production, but the effect is small compared to the genetic influence.
How High is Too High?
Lp(a) is measured in milligrams per deciliter (mg/dL) or nanomoles per liter (nmol/L). The two units are not interchangeable, which creates confusion. Most labs in the United States report in mg/dL, but some use nmol/L.
Here is what the numbers mean:
- Below 30 mg/dL — considered low risk by most experts
- 30 to 50 mg/dL — borderline, some increased risk
- Above 50 mg/dL — high risk, especially if other risk factors exist
These thresholds come from population studies. People with Lp(a) above 50 mg/dL have a significantly higher risk of heart attack and stroke compared to people with levels below 30 mg/dL. The risk increases continuously — there is no safe cutoff where risk suddenly disappears.
About 20% of the world’s population has Lp(a) above 50 mg/dL. That means roughly one in five people carries this genetic risk factor. Many of them do not know it.
Why High Lp(a) is Dangerous
High Lp(a) contributes to heart disease through three main mechanisms.
First, it deposits cholesterol into artery walls just like LDL. Over time, these deposits form plaques that narrow the arteries. This process is called atherosclerosis.
Second, Lp(a) has a structure similar to a blood-clotting protein called plasminogen. It interferes with the body’s ability to break down blood clots. If a plaque ruptures, the clot that forms may be larger and harder to dissolve.
Third, Lp(a) promotes inflammation inside the artery wall. Inflammation makes plaques more fragile and more likely to rupture. A ruptured plaque is what causes most heart attacks and strokes.
Research consistently shows that high Lp(a) increases the risk of aortic valve narrowing — a condition called aortic stenosis. This is a progressive disease where the heart valve becomes stiff and cannot open fully. It is serious and can require surgery to replace the valve.
Can You Lower Lipoprotein(a)?
This is the question most people want answered, and the honest answer is: not yet, not with current medications.
Statins — the most common cholesterol-lowering drugs — do not significantly lower Lp(a). In fact, some studies show statins may slightly increase Lp(a) levels. This does not mean you should avoid statins if your doctor prescribed them. Statins still lower LDL cholesterol, which reduces your overall risk. But they will not fix high Lp(a).
Niacin, a B vitamin, can lower Lp(a) by about 20-30%. However, large clinical trials did not show that niacin reduced heart attacks or strokes when added to statin therapy. Because of this, most doctors no longer recommend niacin for Lp(a) lowering.
PCSK9 inhibitors — a newer class of injectable cholesterol drugs — lower Lp(a) by about 20-30% as a side effect. These drugs are approved for lowering LDL, not for Lp(a). Whether this reduction translates to fewer heart attacks is still being studied.
A new class of medications called antisense oligonucleotides is in clinical trials. These drugs target the LPA gene directly and have reduced Lp(a) by 60-90% in early studies. Results are promising, but these drugs are not yet approved and not yet available outside clinical trials.
No clinical guidelines currently recommend a specific Lp(a)-lowering treatment because no drug has been proven to reduce heart attacks by lowering Lp(a) alone. This is an active area of research, and the landscape may change in the coming years.
What You Can Do If Your Lp(a) is High
Even though you cannot lower your Lp(a) level, you can control the other risk factors that combine with Lp(a) to cause disease. This is the practical approach doctors recommend.
Keep your LDL cholesterol as low as possible. LDL and Lp(a) both contribute to plaque buildup. Lowering LDL reduces the total burden on your arteries. Many experts recommend aggressive LDL targets for people with high Lp(a).
Control blood pressure. High blood pressure damages artery walls, making them more vulnerable to plaque formation. Keeping blood pressure below 120/80 reduces stress on your arteries.
Do not smoke. Smoking damages blood vessels and increases clotting risk. Combined with high Lp(a), the danger multiplies.
Manage diabetes if you have it. High blood sugar accelerates atherosclerosis. Good glucose control slows this process.
Exercise and maintain a healthy weight. These do not lower Lp(a), but they improve blood pressure, cholesterol, and blood sugar. They also reduce inflammation throughout the body.
Some doctors recommend aspirin for people with high Lp(a) and other risk factors. Aspirin reduces blood clotting, which may counteract one of Lp(a)’s dangerous effects. This decision should be made with your doctor. Aspirin carries bleeding risks, and it is not right for everyone.
Who Should Get Tested for Lp(a)?
Testing for Lp(a) is simple — it is a standard blood draw. But not everyone needs it. Experts recommend testing in specific situations.
You should consider testing if you have:
- A personal history of heart attack or stroke before age 55 (men) or 65 (women)
- A family member with early heart disease
- A family member with high Lp(a)
- High cholesterol that does not respond well to treatment
- Aortic stenosis
- Recurrent blockages after heart surgery or stenting
Because Lp(a) is genetic, testing once is enough. You do not need repeat testing. Your level will not change meaningfully over time, except possibly after menopause.
If you test positive for high Lp(a), your siblings and children should also be tested. They have a 50% chance of having the same genetic variant. Knowing this early allows them to control other risk factors before heart disease develops.
Does Diet Affect Lipoprotein(a)?
No diet has been shown to lower Lp(a). This is a common misconception. People often assume that a heart-healthy diet will lower all cholesterol particles, but Lp(a) does not respond to dietary changes.
This does not mean diet is irrelevant. A heart-healthy diet still lowers LDL cholesterol, reduces blood pressure, and helps maintain a healthy weight. These benefits matter enormously for people with high Lp(a). You just cannot expect the diet to move your Lp(a) number.
Some supplements claim to lower Lp(a). The evidence for these claims is weak. Coenzyme Q10, vitamin C, and L-carnitine have all been studied with mixed or negative results. No supplement has been proven to reduce Lp(a) enough to change clinical outcomes.
Frequently Asked Questions
Is high lipoprotein(a) genetic?
Yes, high Lp(a) is inherited and determined by your genes. Your level is largely fixed from birth and does not change with lifestyle.
Can you lower lipoprotein(a) with diet or exercise?
No diet or exercise program has been shown to lower Lp(a). Managing other risk factors like LDL cholesterol and blood pressure is the current strategy.
Does high Lp(a) mean I will have a heart attack?
Not necessarily. High Lp(a) increases your risk, but it does not guarantee heart disease. Controlling other risk factors significantly reduces your overall risk.
How often should I get my Lp(a) tested?
Once is enough. Lp(a) levels remain stable throughout life, so repeat testing is not needed unless you are in a research study.
