Triglycerides are a useful biomarker for cardiovascular and metabolic health, but not a direct longevity marker. Fasting levels above 150 mg/dL indicate metabolic syndrome, which is linked to atherosclerosis, type 2 diabetes, and accelerated aging. However, the association with all-cause mortality is moderate and context-dependent – very high levels are clearly harmful, while mildly elevated levels may be less predictive in certain groups (e.g., endurance athletes). Consumer DNA tests like MyBody-X can analyze variants in genes such as PPARA (rs4253778) that have a small effect on triglyceride metabolism, but the clinical utility is limited. Evidence is based on human observational studies and clinical practice. Caveat: Genetic results cannot replace a standard lipid panel. For longevity assessment, triglycerides should be interpreted together with LDL, HDL, fasting glucose, and inflammatory markers. Safety note: Extremely high triglycerides (>500 mg/dL) increase pancreatitis risk and require medical attention.
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