Oxidized Low-Density Lipoprotein (oxLDL)
Oxidized LDL measures circulating LDL particles whose polyunsaturated fatty acids and apolipoprotein B lysine residues have undergone oxidative degradation, rendering them immunogenic and cytotoxic.
Standard vs. Optimal Reference RangesU/L
Standard reference intervals represent the statistical 95% distribution of unselected commercial populations. Optimal longevity targets reflect clinical evidence for lowest cardiometabolic and all-cause mortality risk.
Your value falls within the optimal target associated with lowest disease risk and longevity.
< 60 U/L
General reference distribution across unselected commercial populations.
< 45 U/L
Concentration target associated with minimal all-cause cardiometabolic mortality.
Molecular Mechanism & Clinical Purpose
Reactive oxygen species generated by vascular myeloperoxidase and lipoxygenases oxidize LDL lipids. Scavenger receptors CD36 and SR-A on macrophages bind oxLDL unregulated, triggering inflammatory cytokine release and foam cell transformation.
Differential Diagnosis
Elevated Levels (oxLDL High)
- •Vascular endothelial oxidative stress
- •Active smoking
- •Uncontrolled hyperglycemia
- •Advanced coronary artery disease
Low Levels (oxLDL Low)
- •High endogenous antioxidant reserve and low vascular inflammation
Technical Reference & Deep Dive
Biochemistry & Enzymatic Pathways
Longevity Risk Architecture & Epidemiology
Pre-Analytical Caveats & Diagnostic Workup
Pre-Analytical Considerations:
Standard testing requires a 10 to 12 hour overnight fast to minimize postprandial chylomicron interference, although oxLDL direct immunoassay is less sensitive to prandial state than calculated LDL-C. Avoid strenuous high-intensity exercise 24 hours prior to blood draw. Serum separator tubes (SST) or EDTA plasma should be centrifuged within 2 hours. High-dose biotin (>5 mg/day) supplementation may interfere with competitive streptavidin-biotin immunoassays, requiring a 48-hour washout period.
Reflexive Testing Protocol:
- Advanced Lipoprotein Particle Quantification (NMR spectroscopy or ion mobility LDL-P)
- Lipoprotein(a) [Lp(a)] baseline evaluation for genetic cardiovascular risk stratification
- Coronary Artery Calcium (CAC) score via non-contrast cardiac CT to evaluate calcified plaque burden
- High-sensitivity C-Reactive Protein (hs-CRP) to assess systemic vascular inflammatory tone
- Carotid intima-media thickness (CIMT) duplex ultrasound to assess subclinical atherosclerosis
Clinical Citations & Primary Literature (1)
- [1]Oxidized Low-Density Lipoprotein in Atherosclerosis and Vascular Aging - Circulation Research (2021). PMID: 33793310
Associated Longevity Guides & Clinical Calculators
Medicine 3.0Explore comprehensive evidence-based clinical protocols, testing costs, and algorithmic calculators that incorporate Oxidized Low-Density Lipoprotein (oxLDL) into overall healthspan optimization.