Does Cod Liver Oil Help With High Blood Pressure?

High blood pressure, also known as hypertension, is a common condition that affects millions of people worldwide. It is often referred to as the “silent killer” because it can lead to serious health complications if left untreated.

While there are many medications available to help lower blood pressure, some people prefer to explore natural remedies, such as cod liver oil. In this article, we will explore whether cod liver oil can help with high blood pressure.

What is Cod Liver Oil?

Cod liver oil is a type of fish oil that is derived from the livers of codfish. It is rich in omega-3 fatty acids, vitamin A, and vitamin D. Omega-3 fatty acids are essential fats that have been shown to have numerous health benefits, including reducing inflammation and improving heart health.

How does Cod Liver Oil Work?

There are several ways in which cod liver oil may help lower high blood pressure. First, it contains omega-3 fatty acids which have been shown to reduce inflammation throughout the body. Inflammation can cause damage to blood vessels and increase the risk of developing hypertension.

Secondly, vitamin D deficiency has been linked with an increased risk of developing high blood pressure. Cod liver oil is rich in vitamin D and taking it regularly may help prevent vitamin D deficiency and reduce the risk of hypertension.

Lastly, some studies have suggested that cod liver oil may improve the function of endothelial cells lining the blood vessels. This improvement in endothelial function can lead to better blood flow and lower blood pressure.

What Does Research Say?

While some studies have suggested that cod liver oil may be beneficial for reducing high blood pressure, there is not enough evidence yet to support this claim conclusively.

A study published in 2016 found that taking 1 gram of cod liver oil per day for six weeks did not significantly lower blood pressure in adults with mild hypertension. However, a review of several studies found that omega-3 fatty acids, found in cod liver oil, reduced blood pressure in people with high blood pressure.

How to Take Cod Liver Oil?

If you are considering taking cod liver oil to help lower your blood pressure, it is recommended that you speak with your healthcare provider first. They can help you determine if it is safe for you to take and what dosage would be appropriate.

Cod liver oil is available in liquid and capsule form. It is important to follow the dosage instructions on the packaging carefully. Taking too much cod liver oil can lead to vitamin A and D toxicity, which can cause serious health problems.


While there is not enough conclusive evidence yet to support the claim that cod liver oil can help lower high blood pressure, there are potential benefits to taking this supplement regularly. Cod liver oil is rich in omega-3 fatty acids and vitamin D, both of which have been linked with improved heart health and reduced inflammation throughout the body.

If you are interested in taking cod liver oil for its potential health benefits, it is important to speak with your healthcare provider first.

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Daniel Bennet