Cod Liver Oil and Cholesterol: Evidence, Benefits, and Precautions

Cod liver oil is rich in omega-3 fatty acids (EPA, DHA), vitamin A, and vitamin D. Research supports its lipid-modifying effects:

Cholesterol Impact

• Meta-analyses show modest reductions in total cholesterol (~5–10%) and LDL cholesterol (~5–15%) with omega-3 supplementation.
• Triglyceride lowering is more pronounced (15–30%), especially at higher doses (2–4 g/day EPA+DHA).
• HDL may increase slightly.

Additional Benefits

• Vitamin A: Vision, immune function, skin health.
• Vitamin D: Bone health, immune regulation.
• Anti-inflammatory: EPA/DHA reduce systemic inflammation.

Side Effects & Precautions

• Common: Fishy aftertaste, heartburn, nausea (mitigated by taking with meals, enteric-coated capsules).
• Contraindications: Avoid with anticoagulants (warfarin, DOACs) due to bleeding risk; caution with history of kidney stones (vitamin D increases calcium absorption).
• Pregnancy: High vitamin A (retinol) can be teratogenic; choose prenatal-specific supplements.

Recommendation

Cod liver oil can complement lipid management but is not a substitute for statins or lifestyle changes. Consult your doctor before starting, especially if on medications or with chronic conditions.