What role does ApoB play in longevity?

ApoB (apolipoprotein B) is the primary protein component of LDL and VLDL particles and is essential for lipid transport. Each atherogenic particle contains exactly one ApoB molecule, so ApoB concentration directly reflects the number of these particles – a more accurate risk marker than LDL cholesterol. Elevated ApoB levels promote cholesterol deposition in arterial walls, leading to atherosclerosis, heart attack, and stroke, thereby reducing longevity. Conversely, interventions such as a Mediterranean diet, regular exercise, and medications like statins or PCSK9 inhibitors lower ApoB and improve cardiovascular outcomes. Long-term studies demonstrate that sustained reduction in ApoB significantly decreases cardiovascular events and extends lifespan. However, ApoB is just one factor; inflammation, blood pressure, and lifestyle also matter. Testing ApoB (e.g., via MyBody-X) can refine individual risk assessment but does not replace medical advice. The evidence is strong (human-strong), supported by large prospective cohorts and Mendelian randomization studies.