What is lipoprotein (a)?

Lipoprotein (a), or Lp(a), is a type of low-density lipoprotein (LDL). LDL is the "bad cholesterol." Lp(a) is similar but has its own features.

How Lp(a) builds plaque in arteries

Lp(a) drives plaque buildup. Plaques are fatty deposits that block blood flow. Higher Lp(a) means more plaque, which raises the risk of heart disease and stroke.

Lp(a) and blood clots

Lp(a) makes your blood clot more easily and makes it harder for your body to break clots down. The result is more risk of heart attacks and strokes.

Lp(a) and inflammation

Lp(a) causes inflammation. Inflammation makes plaques more likely to rupture, which triggers more clotting.

Genetics and Lp(a)

Your Lp(a) is mostly genetic. If your parents have high Lp(a), so will you. Unlike other cholesterol numbers, Lp(a) doesn't move much with diet or exercise.

Why your Lp(a) level matters

Lp(a) gives you information that a standard cholesterol test misses.

What standard cholesterol tests miss

1. Standard tests measure LDL, HDL, and triglycerides, but not Lp(a). Even if your other cholesterol numbers look fine, high Lp(a) can still mean significant risk.
2. Lp(a) is particularly harmful because it promotes blood clotting and inflammation, which standard tests don't capture.

Early detection and management

1. Catching high Lp(a) early gives you time to act with lifestyle changes, medication, or closer monitoring.
2. Early detection also opens the door to targeted interventions for the specific risks tied to high Lp(a).

Personalized health plans

1. Talking to your provider about Lp(a) helps build a plan that covers more than one risk factor (blood pressure, diabetes, and more).
2. A good plan combines lifestyle changes, medication, and regular monitoring.

Why should you test for Lp(a)?

High Lp(a) significantly raises your risk of heart and blood vessel disease. A specific blood test is needed (Lp(a) isn't included in a standard lipid panel in Canada), so you have to ask for it separately. OHIP doesn't cover it, so the cost is usually $15 to $30 depending on the lab. Both our longevity panel and metabolic panel include Lp(a).

Higher risk of heart disease

High Lp(a) raises the risk of several cardiovascular conditions:

• Heart disease: Lp(a) builds plaque in arteries.
• Stroke: the extra clotting risk that comes with high Lp(a) can trigger strokes.
• Aortic valve stenosis: high Lp(a) can narrow the aortic valve, restricting blood flow.

Family history and high cholesterol

If you have a family history of heart disease or high cholesterol, testing for Lp(a) matters even more:

• Inherited levels: Lp(a) is largely genetic, so family history is a strong predictor.
• Early detection means more time to manage the risk.

Recurrent heart events and other risk factors

Knowing your Lp(a) helps if:

• You've had multiple heart attacks or strokes. Lp(a) can be an underlying cause.
• You have high LDL, high blood pressure, or diabetes. Those compound the risk from high Lp(a).

How to interpret Lp(a) levels

What's a normal level?

• Normal: less than 30 mg/dL. Lower Lp(a) means lower heart disease risk.
• Borderline: 14 to 30 mg/dL. Not alarming, but worth keeping an eye on.
• High: above 30 mg/dL.
  • Above 30 mg/dL: high risk.
  • Above 50 mg/dL: highest risk category. Significantly higher chance of heart issues.

How to lower Lp(a)

Lowering Lp(a) is hard. There aren't any FDA-approved medications that specifically target it yet. What you can do is manage overall heart health.

Lifestyle changes

1. Quit smoking. It's one of the biggest risk factors for heart disease.
2. Exercise regularly. At least 30 minutes of moderate exercise most days, things like walking, cycling, or swimming.
3. Eat a healthy diet. Vegetables, fruits, whole grains, lean proteins. Avoid sugary foods and drinks. Add cholesterol-lowering foods like oats, nuts, and foods fortified with plant stanols and sterols.

Medication

No drug targets Lp(a) directly, but some help with cholesterol overall:

• Statins: lower LDL but have limited effect on Lp(a). Still useful for overall heart health.
• PCSK9 inhibitors: lower LDL and also reduce Lp(a) by about 20-30%, though they're mainly used for LDL.

Apheresis

In severe, rare cases, apheresis is an option. It filters the blood to remove Lp(a) and other lipoproteins, similar to dialysis. It's time-consuming and reserved for familial hypercholesterolemia or extremely high Lp(a) levels.

What affects Lp(a) test results?

Several things can shift your Lp(a) numbers.

Biological factors

1. Menopause: hormone changes can raise Lp(a). Post-menopausal women often have higher Lp(a) than pre-menopausal women.

Medications and supplements

1. Estrogen supplements: can lower Lp(a). The effect is significant in post-menopausal women using hormone replacement therapy.
2. Niacin (Vitamin B3): reduces Lp(a), but interacts with other medications and has side effects.

Other factors

1. Other medications: drugs for cholesterol or blood pressure can shift Lp(a). Tell your doctor about every medication you take.
2. Lifestyle: diet, exercise, and smoking indirectly affect Lp(a) by changing overall cholesterol and heart health.

What foods help lower Lp(a)?

Certain foods can help manage Lp(a) and related cholesterol levels.

Plant-based proteins

1. Pulses and beans: lentils, chickpeas, kidney beans. High-quality protein without the saturated fats from meat.
2. Lentils: rich in fiber and protein. Great in soups and salads.
3. Soy products: tofu and soy milk. Protein-packed and good for the heart.
4. Nuts: almonds, walnuts, pistachios. Healthy fats that support heart health.

Cut sugary foods and sweetened drinks

1. Sugary foods: candy, pastries, desserts. These raise overall cholesterol. Cut back.
2. Sweetened drinks: sodas and energy drinks are full of sugar. Water, unsweetened tea, or natural fruit juices are better.

Moderate alcohol

1. Alcohol in excess hits cholesterol, including Lp(a).
2. Stick to one drink a day for women, two for men.

Cholesterol-lowering foods

1. Oats: a bowl of oatmeal has soluble fiber, which lowers LDL.
2. Plant stanols and sterols: in some margarines and orange juices. They block cholesterol absorption in your gut.

LDL vs. Lp(a)

LDL on its own isn't a precise measure of cardiovascular health. It measures the cholesterol inside LDL particles, but not the number, size, or type of those particles, which all factor into your risk.

Lp(a) is a specific type of lipoprotein. It has a unique protein component, apolipoprotein(a), that makes it more atherogenic. High Lp(a) is a strong, independent risk factor for cardiovascular disease, mostly because it drives blood clotting and plaque formation in arteries.

LDL gives you useful information, but it's an incomplete picture. Measuring Lp(a) adds the genetic and atherogenic piece that LDL alone misses.

Disclaimer: This blog post is intended for educational purposes only and should not be taken as medical advice. Always consult your healthcare provider for personal health concerns.