Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Cod liver oil has been studied for its potential benefits to cardiovascular health, particularly due to its high content of omega-3 fatty acids (EPA and DHA), as well as vitamins A and D. Scientific evidence suggests that omega-3s can help reduce triglyceride levels, lower blood pressure, decrease the risk of arrhythmias, and slow the development of arterial plaque, all of which are relevant to arterial and overall cardiovascular health. Several clinical trials and meta-analyses support the use of omega-3 fatty acids in reducing certain risk factors for atherosclerosis and improving endothelial function. However, while cod liver oil is a source of these beneficial fatty acids, fish oil supplements (which are not necessarily derived from cod liver) are more commonly studied and recommended for cardiovascular support. Cod liver oil’s additional high vitamin A content may limit its dosage due to toxicity concerns, and it may not be suitable for all individuals.

Overall, while there is good scientific rationale and some supportive evidence for cod liver oil contributing to arterial health, it is not the first-line or most robustly supported omega-3 supplement for this purpose. The evidence for its direct effect on arteries is moderate (rated 3/5), largely extrapolated from studies on omega-3 fatty acids in general. Individuals interested in using cod liver oil for arterial health should do so under medical advice, especially due to potential risks associated with vitamin A and D overdosing.

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