What is lipoprotein(a) genetic inheritance — if my father has high Lp(a), what is my risk?

Lp(a) levels are 70–90% heritable, meaning your Lp(a) level is primarily genetically determined and is largely unaffected by diet, exercise, or standard lipid-lowering medications (statins modestly increase Lp(a) by approximately 10–15%), and with autosomal codominant inheritance, a child of a parent with elevated Lp(a) has approximately 50% probability of inheriting elevated Lp(a) (Kronenberg, Nat Rev Drug Discov, 2024).

If your father or mother has Lp(a) above 50 mg/dL and a history of premature cardiovascular disease, your own Lp(a) should be tested. The finding of elevated Lp(a) in a man with a family history of premature heart disease changes cardiovascular risk management in several specific ways: more aggressive LDL/ApoB lowering (to remove the other atherogenic drivers operating alongside Lp(a)), more aggressive blood pressure control, aspirin discussion with a cardiologist (Lp(a)'s thrombogenic effect makes antiplatelet therapy more relevant), and prioritization for RNA therapy trials (pelacarsen, olpasiran) as they approach approval.

Honesty Scale: Solid (1) for Lp(a)'s heritability and familial inheritance pattern.

What to do: One Lp(a) test in your lifetime is the current clinical standard recommendation. If you have a family history of premature heart disease, do not delay this test. The result is unlikely to change (it is set by genetics), so one accurate test is sufficient for lifelong risk stratification.

For the full picture, read The ApoB/Lp(a)/Lipids Deep Dive