Lp(a) — The Hidden Risk
The 20% most people don't know about
Lipoprotein(a) — Lp(a), pronounced "L-P-little-a" — is an LDL-like particle with an extra protein attached that makes it uniquely prone to driving atherosclerosis, aortic stenosis, and clotting. About 20% of the population has elevated levels. Your Lp(a) is essentially set at birth.
Genetically determined, lifelong
Lp(a) levels are ~90% heritable and essentially stable from early childhood through old age. Diet, exercise, and statins don't meaningfully lower it. This is why it's a one-time test — once you know your Lp(a), you know it for life.
The risk curve is steep
Lp(a) > 125 nmol/L (~50 mg/dL) carries roughly 2× the cardiovascular-event risk of normal levels. Lp(a) > 250 nmol/L pushes toward 3–4× risk. Family history of early heart attack without obvious risk factors often traces back to elevated Lp(a) nobody tested.
True or False
You can lower your Lp(a) with diet and exercise.
Why most doctors don't order it
Lp(a) hasn't traditionally been on standard panels because until recently there was no specific therapy for it. That's changing: the European Society of Cardiology now recommends measuring it at least once in every adult. US guidelines are catching up. Ask for it — you almost never get it volunteered.
Key Takeaway
Lp(a) is a once-in-a-lifetime test with lifelong implications. 20% of people have elevated levels and don't know it. Knowing your number lets you set the aggressiveness of every other intervention — and prepares you for the RNA-based therapies coming to market this decade.