What role does LDL play in Langlebigkeit?

LDL (low-density lipoprotein) is often labeled 'bad cholesterol,' but its role in longevity is nuanced. Elevated LDL is a well-established risk factor for atherosclerosis and cardiovascular disease, a leading cause of death worldwide. Lowering LDL through diet, exercise, or statins reduces cardiovascular risk and can extend lifespan. However, LDL also performs essential functions: it delivers cholesterol to cells, supports cell membrane integrity, hormone synthesis, and vitamin D production. Extremely low LDL (< 40 mg/dL) is associated with increased risk of hemorrhagic stroke, infections, and possibly cognitive decline. Evidence is human-strong, based on large epidemiological studies and randomized controlled trials (e.g., statin trials). For longevity, a moderate LDL level within target range (individualized by risk profile) appears optimal. Genetic factors (e.g., PCSK9 variants) influence LDL, but direct-to-consumer DNA tests for longevity remain speculative. Caveat: LDL alone is not a complete predictor; inflammatory markers, HDL, triglycerides, and lifestyle are equally important.