Lipoprotein(a)
Also known as: Lp(a)
What Does Lipoprotein(a) Measure?
Lipoprotein(a), commonly abbreviated as Lp(a), is a type of lipoprotein particle found in the blood that consists of a low-density lipoprotein (LDL) particle bound to a unique protein called apolipoprotein(a), or apo(a). This binding creates a distinctive molecule that carries cholesterol and other lipids through the bloodstream. Unlike most lipoproteins, the structure and size of Lp(a) is largely determined by genetics, with over 90% of an individual's Lp(a) level being inherited from their parents. Blood tests measure the concentration of Lp(a) in either milligrams per deciliter (mg/dL) or nanomoles per liter (nmol/L), with nmol/L being the preferred unit as it more accurately captures the number of particles regardless of their varying sizes.
Why Does Lipoprotein(a) Matter?
Elevated Lp(a) is an independent risk factor for cardiovascular disease, including heart attacks, strokes, peripheral artery disease, and aortic valve stenosis. What makes Lp(a) particularly dangerous is that it promotes atherosclerosis (plaque buildup in arteries), triggers blood clot formation, and causes inflammation in arterial walls — all simultaneously. Because Lp(a) levels are primarily genetically determined, high levels can occur even in people who follow a healthy lifestyle, which is why testing for it is important for a complete cardiovascular risk picture. Approximately 1 in 5 people worldwide carry elevated Lp(a) levels, yet it is vastly underdiagnosed. Understanding your Lp(a) level allows for more aggressive management of other modifiable cardiovascular risk factors and may guide decisions about preventive therapies.
Normal Ranges
Males
Less than 30 mg/dL (75 nmol/L) is considered desirable; greater than 50 mg/dL (125 nmol/L) indicates high risk
Females
Less than 30 mg/dL (75 nmol/L) is considered desirable; greater than 50 mg/dL (125 nmol/L) indicates high risk
Children
Less than 30 mg/dL (75 nmol/L); levels are generally similar to adults and largely genetically determined from birth
Causes of High Levels
- Genetic inheritance — the most common and dominant cause, with over 90% of Lp(a) levels determined by variations in the LPA gene
- Kidney disease (nephrotic syndrome or chronic kidney disease) — impairs Lp(a) clearance from the bloodstream
- Hypothyroidism — reduced thyroid hormone levels decrease the liver's ability to clear Lp(a)
- Menopause — the decline in estrogen levels after menopause is associated with rising Lp(a) concentrations
- Trans fatty acid consumption — diets high in trans fats have been shown to modestly elevate Lp(a) levels
- Certain ethnic backgrounds — people of South Asian and Black African descent tend to have genetically higher Lp(a) levels on average
Causes of Low Levels
- Favorable genetic variants in the LPA gene — certain inherited gene variants naturally result in very low Lp(a) production
- Niacin (nicotinic acid) therapy — high-dose niacin can reduce Lp(a) by 20–30%, though cardiovascular outcome benefits are debated
How to Improve Your Lipoprotein(a)
Diet
- Reduce or eliminate trans fats (found in partially hydrogenated oils, many processed and fried foods) as they are linked to higher Lp(a)
- Limit saturated fat intake from red meat and full-fat dairy, which can modestly influence Lp(a) in some individuals
- Increase consumption of omega-3 rich foods like fatty fish (salmon, mackerel, sardines) at least 2–3 times per week
- Follow a Mediterranean-style diet rich in vegetables, fruits, whole grains, legumes, and olive oil to support overall cardiovascular health
- Reduce added sugar and refined carbohydrate intake, which contribute to broader cardiovascular risk alongside elevated Lp(a)
Supplements
- Niacin (nicotinic acid) at doses of 1,000–2,000 mg/day (prescription-grade) may reduce Lp(a) by 20–30%, but must be used under medical supervision due to side effects including flushing and liver stress
- Omega-3 fatty acids (EPA/DHA) at 2–4 g/day may support cardiovascular health, though direct Lp(a) lowering effects are modest
- Coenzyme Q10 (CoQ10) at 100–200 mg/day supports mitochondrial and cardiovascular health, particularly if taking statins alongside Lp(a) management
- L-carnitine supplementation (1–2 g/day) has shown some promise in improving cardiovascular outcomes in those with elevated lipoproteins
Related Biomarkers
Frequently Asked Questions
Can lifestyle changes significantly lower my Lp(a) levels?
Unfortunately, because Lp(a) is over 90% genetically determined, lifestyle changes like diet and exercise have very limited direct impact on Lp(a) levels — typically less than 10% reduction. This is fundamentally different from LDL cholesterol, which responds strongly to dietary and lifestyle modifications. However, this doesn't mean lifestyle doesn't matter. If you have high Lp(a), aggressively managing all other cardiovascular risk factors — such as LDL cholesterol, blood pressure, blood sugar, body weight, and smoking — becomes even more important to counterbalance the inherited risk.
Should I be worried if my Lp(a) is high but all my other cholesterol levels are normal?
Yes, elevated Lp(a) is considered an independent cardiovascular risk factor, meaning it increases your risk even when other cholesterol markers look healthy. However, the absolute risk depends on the degree of elevation and whether other risk factors are present. An Lp(a) above 50 mg/dL (125 nmol/L) is generally considered high risk. If your Lp(a) is elevated, it is important to discuss this with your doctor, who may recommend more aggressive management of all other modifiable risk factors and potentially earlier or more intensive preventive treatment.
How often should I get my Lp(a) tested?
Because Lp(a) levels are largely set by genetics and remain relatively stable throughout a person's life, most major cardiology guidelines recommend testing Lp(a) at least once in adulthood. Repeated testing is generally not necessary unless there is a significant change in health status (such as the development of kidney disease or hypothyroidism) or to verify an initial result. The European Atherosclerosis Society recommends universal Lp(a) screening at least once for all adults. If you have a family history of early heart disease or elevated Lp(a), testing sooner — even in childhood or early adulthood — is advisable.