Lp(a): what your number means
Lp(a) is inherited, barely changes over your life, and has no approved drug. So the question worth answering is not how to lower it — it is what it changes about your risk, and what you should do differently because of it.
Find your number
Pick the unit your lab actually reported. These are two separate scales with two separate thresholds, not two views of one number — do not convert between them with a fixed factor, and be skeptical of any calculator that offers to.
Reported in nmol/L (risk threshold 125 nmol/L)
Reported in mg/dL (risk threshold 50 mg/dL)
The three things worth knowing
The absolute increment is smaller than the headline. In a study of 126,634 people, the top third of Lp(a) saw 5.6 coronary events per 1,000 person-years against 4.4 in the bottom third — about 1.2 extra events per 1,000 person-years. Real, worth acting on, and not the catastrophe a bare relative risk suggests.
Optimal health with high Lp(a) beats poor health with low Lp(a). That is the National Lipid Association's own finding. Lifestyle does not move the Lp(a) number; it does move the outcome. The goal is lower absolute risk, not a better Lp(a) result.
It affects your aortic valve, not just your arteries. Lp(a) is causally linked to calcific aortic valve stenosis, and the risk crosses the same hazard ratio at a lower level than heart-attack risk does — around 154 nmol/L for the valve versus 193 nmol/L for myocardial infarction. Unlike the coronary side, lowering LDL has repeatedly failed to help the valve in trials.
What to do about an elevated result
- Treat ApoB and LDL harder. Elevated Lp(a) raises the intensity of treatment you warrant — it does not create an Lp(a)-specific target, and no guideline sets one.
- Test your first-degree relatives. Cascade testing is a Class 1 recommendation, and one test settles it for life.
- Control everything else that is actually movable: blood pressure, smoking, blood sugar, fitness.
Elevated Lp(a) means treating ApoB and LDL harder.
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Build my personalized planFrequently asked
What is a normal Lp(a)?
Guidelines flag risk from 125 nmol/L, or 50 mg/dL if your lab reported mass units. Below that is generally considered low risk. The two thresholds are not interchangeable readings of one scale — use the one matching the unit your lab actually printed.
Why can't I convert nmol/L to mg/dL?
An Lp(a) particle's mass depends on its apo(a) isoform size, and that varies between people, so no single multiplier is correct for everyone. The National Lipid Association gives a Class III (harm) recommendation against fixed-factor conversion — it misclassifies a meaningful share of results right at the decision threshold.
How do I lower Lp(a)?
For practical purposes you don't, and it is the wrong goal. Lp(a) is roughly 80-90% genetic, lifestyle does not meaningfully move it, and no Lp(a)-lowering drug is approved anywhere yet. What lowers your actual risk is treating ApoB, LDL and every other risk factor harder.
How often should I test it?
Usually once in a lifetime. The 2026 AHA guidance recommends measuring Lp(a) at least once in all adults. Because the level is genetically set and stable, repeat testing rarely adds anything unless your clinician has a specific reason.