Lp(a): The Inherited Risk Your Cholesterol Panel May Miss

Who should ask about an Lp(a) test?

If you do not know whether yours has ever been checked, start there. Lp(a) is not automatically included in the usual cholesterol test. The 2026 ACC/AHA cholesterol guideline recommends measuring it at least once in adulthood.

Lp(a), pronounced L-P-little-a, is a cholesterol-carrying particle whose level is mostly inherited. Healthy habits still matter for your heart, but they usually do not lower Lp(a) very much. A high result does not predict your future by itself. It adds one more piece to your heart story.

Lp(a) is largely inherited, so one measurement is often enough. If an earlier result was intermediate, between clearly low and high, ask whether repeating it could change your risk assessment or prevention plan, particularly after menopause. Pregnancy, kidney disease and an underactive thyroid (hypothyroidism) can also affect the result; your clinician can decide whether and when to repeat it. Menopause alone does not mean you need routine repeat testing.

Sources: 1, 3

What does a high Lp(a) result mean?

A high Lp(a) result may lead your clinician to look more closely at your overall chance of heart and blood-vessel disease—and at the parts you can act on now, such as blood pressure, LDL cholesterol, smoking, diabetes, physical activity, and follow-up.

The test cannot show whether plaque is already present, identify a blocked artery, explain a symptom, or decide treatment by itself. It helps answer a narrower question: does this inherited risk change what we should pay attention to or do next?

• Ask whether Lp(a) has already been measured.
• Ask whether—and how—the result changes how your clinician understands your overall heart risk.
• Ask which risks you can act on now.

Because it is inherited, the information may matter beyond you

If your Lp(a) is elevated, ask whether your parents, siblings or children should be tested. Their own clinicians can help decide when to test, including for children.