Can LDL help with longevity?

Whether LDL (low-density lipoprotein) can contribute to longevity is a nuanced and debated topic. LDL is widely known as 'bad' cholesterol because elevated levels are a major risk factor for cardiovascular disease, which shortens lifespan. However, some observational studies, especially in older adults, have reported an 'LDL paradox' where very low LDL is associated with higher mortality, possibly due to protective roles in immune function or nutrient delivery. The provided context does not contain direct evidence linking LDL to longevity; it includes a FOXO3 variant (rs2764264) associated with longevity and DNA methylation clocks for biological age, but neither addresses LDL. Therefore, the evidence level is unclear. From a practical standpoint, maintaining LDL within a moderate range (e.g., through diet, exercise, and medical guidance) is prudent for overall health. Extreme values—either very high or very low—warrant clinical evaluation. No single biomarker or genetic test can reliably predict longevity, and lifestyle factors remain paramount.