Fish oil and krill oil both contain omega-3 fatty acids, particularly EPA and DHA – two types renowned for their heart and brain health benefits.
However, while both oils deliver omega-3s, some claim krill oil offers superior absorption and additional benefits. Krill oil derives from Antarctic krill, whereas fish oil comes from various fatty fish, creating distinct differences in their properties and benefits.
In this article, we’ll examine the key differences between krill vs. fish oil and determine which option might serve you better. Since both contain omega-3s, understanding their unique qualities and benefits will help you make an informed choice.
Let’s dive into this comprehensive guide to Krill Oil vs. Fish Oil!
What Is Krill Oil?
Krill oil comes from small, shrimp-like creatures called Antarctic krill. These tiny animals serve as a primary food source for mantas, baleen whales, and whale sharks. In Norwegian, “krill” literally means “whale food.”
Due to its omega-3 fatty acid content, krill oil is used for heart conditions, eye problems like dry eye disease, elevated triglycerides, and high cholesterol. However, more research is needed to confirm krill oil’s effectiveness against these conditions.
Beyond omega-3 fatty acids, krill oil contains substantial amounts of astaxanthin, an antioxidant responsible for the oil’s distinctive reddish color.

Benefits Of Krill Oil
Regarding health benefits, these omega 3 supplements deliver largely the same advantages since both are rich in omega-3 fatty acids. However, krill oil possesses unique properties that may make it superior to fish oil. Let’s explore the evidence below.
1. Better Absorption
Among krill oil’s many effects, we’ll focus on the most studied benefits. Some human studies suggest our bodies absorb krill oil more efficiently because its fatty acids exist as phospholipids, which experts believe make krill oil more bioavailable than fish oil, where fatty acids exist as triglycerides.
For instance, in one study, participants took either fish oil or krill oil, with the krill oil containing lower doses than the fish oil. Despite the lower doses, both supplements delivered equivalent amounts of DHA and EPA to participants.
Nevertheless, while studies examine krill oil’s absorption, many experts believe more research is needed to definitively conclude that krill oil is better absorbed than fish oil.
2. Greater Antioxidants
Astaxanthin is a powerful antioxidant found in krill oil. Besides giving krill oil its reddish hue, research suggests astaxanthin provides heart health benefits along with anti-inflammatory and antioxidant properties.
In one example, a study found astaxanthin can reduce triglyceride levels and increase HDL or “good” cholesterol. However, this study used higher astaxanthin amounts than what’s typically found in standard krill oil supplements.
Still, obtaining antioxidants remains beneficial because they protect your body from inflammation by neutralizing free radicals, a major contributor to inflammatory processes.
Chronic inflammation can contribute to serious diseases like heart disease, diabetes, and obesity.
What Is Fish Oil?
Fish oil is extracted from fish, particularly fatty varieties. Like krill oil, fish oil is renowned for its omega-3 fatty acid content. In fact, when it comes to omega-3 sources, fish oil is more widely recognized than krill oil.
As mentioned, fish oil is obtained from fish consumption. If you regularly eat fish, you’re likely getting substantial amounts of omega-3 fatty acids. Fish oil is found in fatty fish like tuna, salmon, mackerel, and herring. Beyond eating fish, you can obtain this oil through dietary supplements.
Fish oil is recognized for its benefits regarding heart disease and brain health, thanks to its omega-3 content. The US Food and Drug Administration (FDA) has even approved certain fish oil products as prescription medicines to lower triglyceride levels.
However, these supplements differ from prescription fish oil medicines – supplements contain lower concentrations than their prescription counterparts, so they cannot serve medicinal purposes.

Benefits Of Fish Oil: The “Fatty Fish”
Like krill oil, fish oil provides similar health benefits due to its rich omega-3 fatty acid content, particularly DHA and EPA, both known for supporting heart and mental health. But can fish oil compete with krill oil’s advantages?
1. More Accessible
While fish oil may be less bioavailable than krill oil, its primary advantage lies in accessibility.
Fish oil is more accessible and affordable than its counterpart. You can obtain this oil simply by eating fatty fish like tuna, mackerel, and salmon. If you regularly consume these fish, you’re already getting substantial amounts of fish oil and its omega-3 fatty acids.
Additionally, fish oil supplements cost less than krill oil supplements. While krill oil may be more bioavailable, it’s significantly more expensive. Budget-wise, fish oil offers better long-term sustainability than krill oil.
In essence, though fish oil may be less potent in certain properties compared to krill oil, its accessibility and affordable supplementation make it highly practical.
Does Krill Oil Or Fish Oil Contain Omega 3?
The primary benefits of both krill and fish oil stem from their omega-3 content. Omega-3s comprise alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). While EPA and DHA receive more attention, ensuring ALA is present is crucial for maximum health benefits.
These omega-3s exist in both the original source and supplement form. This means obtaining benefits from fatty fish is equally helpful as taking supplements or vitamins.

Krill Oil Vs. Fish Oil: Which Is Better?
Krill oil vs fish oil – which benefits you more? While krill and fish oil have notable differences, their health benefits remain largely similar – both are rich in omega-3s and can support heart disease prevention and brain health. Ultimately, choosing between fish oil and krill oil depends on your personal preferences and priorities.
You may choose to explore the benefits of krill oil to see if it works better for you than fish oil. However, krill oil comes at a premium price, which may strain your budget long-term.
Conversely, while fish oil may lack some of krill oil’s advantages, its accessibility and affordability mean you can obtain sustainable amounts of omega-3s from it – particularly if you enjoy eating fish like tuna and salmon, you’re already getting substantial amounts!
Recommended Fish Oil And Krill Oil Brands
The advantage of these supplements is their typically minimal side effects. When selecting a supplement, ensure you buy high-quality products. Avoid products boasting exaggerated benefits like “will prevent heart attacks” – these are red flags. High-quality brands promote reasonable benefits and sound more credible than heavily marketed alternatives.
If you want to try omega 3 supplements and aren’t sure which brand to choose, here are some of our recommendations. These supplements have been tested and verified by both the brands and independent sources, making them excellent options.
Nature Made Fish Oil 1200mg Vitamin D 1000IU

Beyond providing EPA and DHA, this supplement also delivers substantial vitamin D, which is important since few food sources contain this nutrient. This ranks among the most popular fish oil supplements on the market, and rightfully so – it’s high-quality from a reputable brand.
GET THE BEST PRICE ON NATURE MADE FISH OILLife Extension Super Omega-3 EPA/DHA

Fish oils are excellent for boosting energy levels. Life Extension delivers 1200mg of EPA and DHA per serving, hence the “Super Omega-3” name! You’re getting higher concentrations of EPA and DHA from this supplement, making it one of the premier fish oil options.
GET THE BEST PRICE ON LIFE EXTENSION SUPER OMEGA-3 EPA/DHAViva Naturals Antarctic Krill Oil

Unlike standard krill oil capsules, Viva Naturals contains high concentrations of both krill oil and astaxanthin. This can make the supplement more effective than regular krill oil products.
GET THE BEST PRICE ON VIVA NATURALS ANTARCTIC KRILL OILSports Research Antarctic Krill Oil

This Sports Research supplement contains no fillers or soy. The supplement consists of only three ingredients in addition to the krill oil itself.
GET THE BEST PRICE ON SPORTS RESEARCH ANTARCTIC KRILL OILShould You Give Krill Oil Or Fish Oil A Try?
These supplements are undoubtedly beneficial for your body, as oily and fatty fish are excellent for preventing heart attacks and providing humans with omega-3s.
If you’re looking to increase your daily omega-3 intake, supplementing with these oils can be highly beneficial. The three omega fatty acids – alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA) – offer various benefits that can enhance your well-being. While EPA and DHA are better known than ALA, all three provide advantages. EPA and DHA are found in fish and other seafood, but krill contains all three.
Omega-3 supplements can address various health issues, from alleviating depression and anxiety to improving metabolic health and enhancing heart health. One of the most common reasons people take omega-3 supplements is to improve or prevent heart disease.
Always conduct thorough research on supplement health information before trying them. Ignore media websites during your research, and stick to medical or nutritional sources for reliable information.








