What is lipoprotein(a) and why is it tested?
Lipoprotein(a), or Lp(a), is a genetically determined lipoprotein particle that independently raises cardiovascular risk. It is largely fixed for life and not modifiable by lifestyle. Once measured, it informs the intensity of every other modifiable cardiovascular lever — ApoB, blood pressure, glycemic control.
Full answer
Lipoprotein(a) is an LDL-like particle with an attached apolipoprotein(a) tail. Its level is roughly 80–90% genetically determined, established in early life, and largely unchanged by diet, exercise, or standard lipid-lowering therapy. Elevated Lp(a) independently predicts atherosclerotic cardiovascular disease and aortic valve stenosis. Because Lp(a) is essentially fixed, it is checked once in adulthood (sometimes twice in a lifetime) and then used to calibrate the intensity of every modifiable cardiovascular lever — ApoB, blood pressure, glycemic control, smoking cessation, and where indicated, lipid-lowering therapy. A normal Lp(a) does not eliminate risk; an elevated Lp(a) elevates the bar for everything else. Provider review reads Lp(a) within the broader cardiometabolic panel rather than in isolation.
Educational. Not a substitute for individualized provider review.
- Lipoprotein(a) — Primary source · oMeds
- Longevity intelligence — Reference · oMeds Learn
- Reviewed by Dr. Laura Purdy, MD, MBA · Clinical Director, oMeds · Last reviewed 2026-05-29