Human lipoprotein(a) (Lp(a)) is a lipoprotein complex composed of a low-density lipoprotein (LDL) particle and a large highly polymorphic glycoprotein named apolipoprotein (a) (apo(a)). There is evidence that Lp(a) is linked to cardiovascular disorder risk.

Researchers at Curtin University in Perth, Australia, have discovered that leakage from blood into the brain of fat-carrying particles transporting toxic proteins are a possible cause of Alzheimer's disease.