Are Krill Shrimp the Secret to a Healthy Heart?

Krill shrimp, also known as euphausiids or krill, are small crustaceans that are found in many parts of the world, particularly in cold waters, such as in the Antarctic and North Pacific Oceans. Due to their small size, they are often considered to be mini powerhouses of nutrition. Apart from being a popular food source for various marine animals, krill shrimp have also gained recognition for their potential health benefits for humans, particularly when it comes to improving heart health. So, are krill shrimp truly the secret to a healthy heart? Let’s explore the science around this topic.

The Nutritional Value of Krill Shrimp

Krill shrimp are a rich source of several nutrients that are essential for a healthy body. They contain high amounts of protein, omega-3 fatty acids, and astaxanthin, a carotenoid with antioxidant properties. These nutrients make krill shrimp a potential superfood that can help in reducing inflammation, improving heart health, boosting the immune system, and reducing the risk of chronic diseases such as cancer.

Protein in Krill Shrimp

Protein is an essential nutrient that helps in repairing and building tissues in the body. Krill shrimp are rich in protein content, with about 60-65% of their total weight being protein. This makes krill shrimp an excellent source of protein that can help in promoting muscle growth and recovery.

Omega-3 Fatty Acids in Krill Shrimp

Omega-3 fatty acids are a type of polyunsaturated fat that are very beneficial for heart health. These fats help to reduce inflammation, lower blood pressure, and prevent the formation of blood clots, all of which can contribute to good heart health. Krill shrimp are a rich source of omega-3 fatty acids, particularly eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) forms that are easily absorbed by the human body.

Astaxanthin in Krill Shrimp

Astaxanthin is a type of carotenoid that gives krill shrimp its reddish-orange color. It is a powerful antioxidant that helps to prevent damage caused by free radicals that can damage cells in the body. Antioxidants play a crucial role in reducing the risk of chronic diseases such as cancer, heart disease, and Alzheimer’s disease. Krill shrimp contain much higher levels of astaxanthin than other sources of this nutrient, such as salmon or trout.

The Effects of Krill Shrimp on Heart Health

There is a growing body of research that shows how krill shrimp can have beneficial effects on heart health. By reducing inflammation, lowering blood pressure, and preventing blood clots, krill shrimp may help to improve overall cardiovascular health.

Krill Shrimp and Omega-3 Fatty Acids

A study published in Lipids in Health and Disease found that krill oil supplementation was more effective in reducing triglyceride levels and increasing HDL cholesterol (the “good” cholesterol) than fish oil supplementation. Omega-3 fatty acids have also been shown to reduce inflammation in the body, which can be a contributing factor to heart disease.

Krill Shrimp and Blood Pressure

High blood pressure is a risk factor for heart disease, and research indicates that krill shrimp may have a beneficial effect on reducing blood pressure. In a study published in the Journal of the American College of Nutrition, participants with high blood pressure who consumed krill oil supplements showed a significant reduction in both systolic and diastolic blood pressure.

How to Incorporate Krill Shrimp into Your Diet

There are several ways to incorporate krill shrimp into your daily diet. Krill oil supplements are widely available and are a convenient way to increase your intake of omega-3 fatty acids and astaxanthin. If you prefer fresh krill shrimp, many seafood markets offer them as a sourcing option. Krill shrimp can be grilled, baked, or sautéed and can be included in a range of dishes such as salads, pastas, soups, and stews.

Considerations and Precautions

While krill shrimp are generally considered safe to consume, it is essential to be mindful of potential allergies or interactions with other medications. If you have a history of seafood allergies, it is recommended that you consult with your doctor before incorporating krill shrimp supplements or fresh krill shrimp into your diet.

It is also important to note that supplements are not a replacement for a healthy diet and lifestyle, and dietary supplements should not be taken as medical treatment or for the prevention of any illnesses.


Krill shrimp are a superfood that packs significant nutritional value, and their potential for improving heart health and preventing chronic illnesses such as cancer and Alzheimer’s disease is something to consider. With the many benefits provided by this protein powerhouse, we could all benefit from occasionally incorporating them into our diet.

Most Common Questions and Answers Related to ‘Are Krill Shrimp the Secret to a Healthy Heart?’

  • Are krill shrimp better than fish oil supplements for heart health?
    While both krill oil and fish oil are good sources of omega-3 fatty acids, recent studies suggest that krill oil may have an edge in improving heart health as it has higher bioavailability and contains astaxanthin, a potent antioxidant.

  • What is the daily recommended intake of krill shrimp?
    There is no specific recommendation for the daily intake of krill shrimp, although krill oil supplements usually have a recommended dosage. It is recommended to talk to your healthcare provider before adding any supplements to your diet.
  • Are there any side effects of consuming excessive amounts of krill shrimp?
    As with any dietary supplement, taking too much krill shrimp or krill oil can lead to gastrointestinal issues such as diarrhea or nausea. It is essential to follow the recommended dosage and consult with your healthcare provider.
  • Can people with seafood allergies take krill shrimp?
    Individuals with seafood allergies should consult with their healthcare provider before taking any krill shrimp supplements or fresh krill shrimp.
  • What are some other sources of omega-3 fatty acids?
    Omega-3 fatty acids can be found in fatty fish, such as salmon and tuna, or in plant-based sources such as flax seeds and chia seeds.


  • Liu, X. et al. (2020). The Nutritional Characteristics and Potential Health Benefits of Krill Oil. Marine Drugs, 18(7), 347.
  • Bunea, R. et al. (2004). Evaluation of the Effects of Neptune Krill Oil on the Clinical Course of Hyperlipidemia. Alternative Medicine Review, 9(4), 420-428.
  • Deutsch, L. (2007). Evaluation of the Effect of Neptune Krill Oil on Chronic Inflammation and Arthritic Symptoms. Journal of the American College of Nutrition, 26(1), 39-48.
  • Kidd, P. (2015). Omega-3 DHA and EPA for Cognition, Behavior, and Mood: Clinical Findings and Structural-Functional Synergies with Cell Membrane Phospholipids. Alternative Medicine Review, 16(3), 263-274.

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