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Fish Oil Vs. Krill Oil: Which Is the Best for Weight Loss?

Have you ever wondered why there are so many krill oil and fish oil in the market? It's because both of them have a lot to offer for your health, but there is still a debate as to which one is the best. Krill oil may have a greater effect on cholesterol levels while fish oil is more effective at reducing inflammation.

Joe Wilson
Fish Oil Vs. Krill Oil: Which Is the Best for Weight Loss?
Table Of Contents

Our body can't make omega-3 fatty acids on its own, so we need to include enough of them in our diet. Omega-3 fatty acids provide the body with many benefits, including improved brain health, reduced cholesterol levels, decreased inflammation, better heart health, weight loss, etc. 

Fish oil is a well-known dietary supplement obtained from fatty fish. But have you heard about the newly researched krill oil? It is obtained differently from tiny sea creatures like crustaceans, Antarctic krill, etc. Both the oils are enriched with EPA and DHA, but there is a difference in beneficial factors.

Fish oil comes from a variety of fatty fish. The two vital omega-3 fatty acids, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), enrich the fish oil, the best part of fish oil. Mackerel, salmon, tuna, and other fishes, are rich in these oils used to take fish oil. 

Fish oil is different from krill oil because of omega-3 fatty acids and other nutritious levels. Omega fish oil supplements provide the body with the essential nutrients to keep you healthy. These supplements are great for your heart health managing various diseases and health problems. 

You can also consume omega-3 fatty acids through diet. But for some, it can be tough to fulfill the body's needs. So, omega fish oil supplements can be the best choice in such cases. They are easy to consume and effective on your health.

The Importance of Omega Fatty Acids 

Our body can make fats from raw materials or even other fats. But when it comes to omega-3 fatty acids, our body can't produce them on its own. So, to fulfill the body's need for omega-3 fatty acids, we require supplements or food items like fish, nuts, vegetable oils, etc.

Omega-3 fatty acids improve your health and overall well-being. To your surprise, omega-3 fatty acids play a vital role in hormone production in the cell membranes. Such fats affect the functional capability and genetic performance of cell receptors. Omega-3 fatty acids come in three types, two of which are pretty helpful for our health. Here are the three types:

  • Eicosapentaenoic acid (EPA)
  • Docosahexaenoic acid (DHA)
  • Alpha-linolenic acid (ALA)

All three omega fatty acids are beneficial for our body, but two are commonly found in supplements and diets. They help us manage heart diseases and cholesterol levels. There are proven benefits of omega fatty acids, such as reducing body inflammation, swelling, and lowering blood pressure for better vessel function. Some researchers even state the positive impacts of omega fatty acids on cancerous tissues. 


We must consume enough amount of omega-3 fatty acids for a healthy condition. Fish oil supplements can help you overcome your health issues. Have a look at some of the pros of using fish oil:

  • Improve Heart Health: Studies have shown the impact of fish oil on heart health. People who regularly consume fish oil have reduced chances of heart diseases than those who don't. Fish oil reduces bad cholesterol levels while increasing good cholesterol levels. Also, it lowers blood pressure levels.
    The effects of high levels of specific fat type triglyceride can lead to several diseases, such as heart disease. It is essential to lower the triglyceride level, and there are many ways to do that. The two most common and effective ways are weight loss and intake of omega-3 fatty acids. With this combination, you can efficiently lower excessive triglyceride levels. 
  • Help with Mental Health Conditions: The fish oil supplements may also help with mental disorders. Suffering from mental illness can reduce the levels of omega-3 fatty acids in your brain. The brain needs a good amount of fats to function well. Studies show that intake of fish oil can improve brain functionality by increasing the levels.
  • Helps Lose Weight: There is much evidence that fish oil can benefit obese people to lose weight healthily. The reason is the presence of omega-3 fatty acids, which are responsible for better health and improved functionality. 
  • Reduces Inflammation: As fish oil helps with high blood pressure and cholesterol levels, studies also prove that it reduces inflammation. Also, fish oil has anti-inflammatory properties; therefore, it can improve the symptoms of chronic diseases. 


We all know that, with multiple benefits, there are some side effects too. Here are some of the cons of fish oil usage:

  • May Cause Nose Bleeding: With inappropriate amounts of fish oil, there are increased chances of nose bleeds. It is because of the decrease in blood clotting.
  • May Lower Blood Pressure: Consuming higher fish oil can negatively affect blood pressure. Low blood pressure is one of the common side effects.
  • May Affect Bowel Movements: Fish oil, when taken excessively, can affect bowel movements. As a result, you might suffer from diarrhea.

Benefits of Krill Oil

Krill is a tiny creature that resembles a shrimp and can be found in any ocean, specifically the Antarctic Ocean. These small, pinkish, transparent creatures are the primary food source of most big fishes. Krill oil is obtained through a cold vacuum process to prevent destroying the Krills. 

Consumption of krill oil can benefit you in different ways. People usually confuse fish oil with krill oil, whereas both are different. Krill oil plays a vital role in our lives because omega-3 fatty acids are in the form of phospholipids in it. The difference in a form improves the absorption of fats. 

With the help of krill oil, your tissues absorb easily and efficiently. The beneficial molecular structure of krill oil helps boosts brain health. It also has an amazing antioxidant to reduce inflammation. 


Krill oil supplements have proven beneficial effects on health. Let's read about the pros first: 

  • Easy to Absorb: Because of the different molecular structures of krill oil, it is easier for the body to absorb these fats into the bloodstream.
  • Reduces Inflammation: Krill oil is highly effective for reducing inflammation while working on the symptoms of arthritis. Fish or krill oil are vital omega-3 fatty acids with proven benefits for various chronic diseases.
    Such oils can enhance cell functionality while preventing cell damage. They can help minimize inflammation and swelling. As a result, it helps overcome joint damage and decrease the symptoms of rheumatoid arthritis. 
  • Improves Heart health: The oil has a beneficial impact on your heart health because of the ability to lower bad cholesterol levels. It also increases good cholesterol levels. 
  • Improves Eye Health: Research has shown improvement in eye redness. Treating dry eyes gets easier with the consumption of krill oil. Studies have shown an incredible improvement in dry eye The reduction in eye redness is the most common benefit. However, the researchers are not enough, and more studies are needed.


  • Expensive: The price of krill oil is not the same as of fish oil. It is too costly because of the less regulation of the krill fishery.
  • Less Research: Krill oil is a recent product with not enough studies. There is a lot more research to do on it.

Krill Oil Vs. Fish Oil

Fish oil is a well-known product because of a variety of health benefits. It can be obtained from many fatty fishes like tuna, sardines, herring, mackerel, etc., whereas krill oil comes from a shrimp-like creature, krill. 

Both oils have the most important omega-3 fatty acids, EPA and DHA. There are slight differences, but both krill and fish oil have multiple benefits for you and your body.

Krill oil vs. fish oil is under debate because of recent research. There are some slight differences. Some think of fish oil as a better option, while others prefer krill oil. Experts are working on the comparison by investigating the EPA and DHA levels in the blood. With limited research, it is pretty challenging to declare the better option. But we can watch some differences to figure out the effective one for our body.

Researchers are working hard to investigate the comparison results of fish and krill oil. Some studies have shown that krill oil results in an increase in LDL cholesterol levels. In contrast, other research studies credit fish oil for good cholesterol levels. There is a need for more investigation to determine which one helps maintain cholesterol levels. 

Some people think of cod liver oil to be better than krill oil. But that's not true. We have already mentioned that every oil has different health benefits, with a variety of advantages there are some side effects too. Upon comparing krill and cod liver oil, it is necessary to keep the amounts of vitamin A and D in mind. 

Cod liver oil has higher vitamin A and D, which can be a problem for your body if consumed inappropriately. These fat-soluble vitamins can be toxic because the body stores such vitamins. 

The comparison debate will go on; until the researchers end up with several studies. But when we talk about weight loss and cholesterol control, there are some factors to consider for an appropriate decision that you can follow while reading through our buyer's guide. 

Buyer's Guide

1. Nutrient absorption

Research has proved a difference in the molecular structure of krill and fish oils. Krill oil has omega3 fatty acids in the form of phospholipids which are easier for the body to absorb in the bloodstream. However, the EPA and DHA levels are the same. 

2. Cost

Krill oil is a recent product, whereas fish oil has been a well-known supplement for years. Krill fishery is not regulated properly because krill oil is too expensive compared to fish oil. On the other hand, fish oil is easily accessible for any individual. However, studies have shown that even smaller quantities of krill oil can provide the same benefits.

3. Antioxidants

Krill oil has antioxidant properties to reduce inflammation and swelling. As a result, there is a notable decrease in the symptoms of various chronic illnesses, whereas fish oil has not enough evidence in this category.

4. EPA and DHA Concentration

Fish oil has high concentrations of EPA and DHA compared to krill oil. However, it can be because of less investigation too. But for now, we know that fish oil can be more effective with higher amounts of omega-3 fatty acids. 

Omega 3 fish oils supplements are an excellent supplement for anyone who wants to improve their fish intake for health reasons. The Omega-3 fish oil supplement by DMoose is a good choice for improving heart health and reducing weight. It helps keep blood vessels flexible and prevents strain on vein walls. 

This helps prevent blood clots and blood vessel damage. It also helps prevent plaque buildup, leading to strokes or heart attacks. These Fish oil tablets contain omega-3s to lower the risk of high cholesterol. They also reduce LDL triglycerides and raise HDL levels.


There are not enough investigations on krill oil, so it is inappropriate to declare any of them to be the best, but both ensure specific benefits. Fish oil is a cheaper, more effective, and well-known supplement for weight loss. On the other hand, krill oil is a bit expensive but is instant, efficient, easy to consume, and good for quick absorption. 

These oils can reduce inflammation, risks for cardiovascular diseases and balance cholesterol levels while helping with weight loss. Krill oil can be a better option in weight loss because of the molecular structure that allows better nutrient absorption. Moreover, the antioxidant properties can facilitate your weight loss journey. Still, there are researches needed to declare the actual better option. 

Reading List

Omega 3 Vs. Omega-3-6-9: What Do the Experts Say?

What Is Micronutrient Deficiency

Vitamins and Minerals That You Should Eat

Foods to Boost Immunity

Article Sources

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  • Calder, Philip C. "Omega-3 Fatty Acids and Inflammatory Processes." Nutrients, vol. 2, no. 3, Mar. 2010, pp. 355–74. PubMed Central,
  • Chowdhury, R., et al. Association between Fish Consumption, Long Chain Omega 3 Fatty Acids, and Risk of Cerebrovascular Disease: Systematic Review and Meta-Analysis. Centre for Reviews and Dissemination (UK), 2012.,
  • Deinema, Laura A., et al. "A Randomized, Double-Masked, Placebo-Controlled Clinical Trial of Two Forms of Omega-3 Supplements for Treating Dry Eye Disease." Ophthalmology, vol. 124, no. 1, Jan. 2017, pp. 43–52. PubMed,
  • Du, Shichun, et al. "Does Fish Oil Have an Anti-Obesity Effect in Overweight/Obese Adults? A Meta-Analysis of Randomized Controlled Trials." PLoS ONE, vol. 10, no. 11, Nov. 2015, p. e0142652. PubMed Central,
  • Eslick, Guy D., et al. "Benefits of Fish Oil Supplementation in Hyperlipidemia: A Systematic Review and Meta-Analysis." International Journal of Cardiology, vol. 136, no. 1, July 2009, pp. 4–16. PubMed,
  • "Omega-3 Supplements: In Depth." NCCIH, Accessed 3 Jan. 2022. 
  • Peet, Malcolm, and Caroline Stokes. "Omega-3 Fatty Acids in the Treatment of Psychiatric Disorders." Drugs, vol. 65, no. 8, 2005, pp. 1051–59. PubMed,
  • Swanson, Danielle, et al. "Omega-3 Fatty Acids EPA and DHA: Health Benefits Throughout Life1." Advances in Nutrition, vol. 3, no. 1, Jan. 2012, pp. 1–7. PubMed Central,
  • Ulven, Stine M., and Kirsten B. Holven. "Comparison of Bioavailability of Krill Oil versus Fish Oil and Health Effect." Vascular Health and Risk Management, vol. 11, Aug. 2015, pp. 511–24. PubMed Central,

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Joe Wilson

Mr. Wilson is a motivated fitness instructor accomplished in helping clients of all fitness levels get into shape and achieve their health and fitness goals. Strongly believes health is a conscious lifestyle choice necessary for longevity and happiness.

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