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LP Little A is a prevalent and causal risk factor for atherosclerotic vascular disease. It consists of an LDL-like particle that carries cholesterol into the arterial walls. High levels of LP Little A are associated with increased risks of myocardial infarction, aortic stenosis, heart failure, ischemic stroke, and cardiovascular mortality. Recurrent cardiovascular events may indicate elevated LP Little A levels. Lifestyle interventions have minimal impact on LP Little A levels, which are mostly determined by genetic variability. LP Little A should be measured at least once in individuals' lifetimes and in patients with less than expected reductions in LDL cholesterol or recurrent events despite lipid-lowering therapy. While therapeutic options are currently limited, specific therapies under investigation show promising reductions in LP Little A levels.