Krill Oil Supplements: Guide

October 22, 2024 Lyka Casila

Key Takeaways

Krill Oil Offers Superior Absorption: Its phospholipid structure improves bioavailability, making it more effective than fish oil with smaller doses.
Rich in EPA, DHA, and Astaxanthin: These nutrients support heart, brain, joint, and eye health, while astaxanthin provides antioxidant protection.
Fewer Digestive Issues: Krill oil causes less fishy aftertaste and reflux compared to traditional fish oil supplements.
Safe for Most but Requires Caution: Individuals with shellfish allergies, those on blood-thinning medication, and pregnant or breastfeeding women should consult a healthcare provider before use.
Sustainably Sourced: Krill oil is harvested under strict environmental regulations, ensuring minimal impact on marine ecosystems.
Look for Quality Certifications: Choose krill oil supplements with MSC and third-party lab certifications to ensure sustainable sourcing and product purity.

Krill oil supplements have gained traction as a reliable source of omega-3 fatty acids, offering several health benefits. Extracted from small Antarctic krill, these supplements provide EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) in a form that the body absorbs more efficiently than traditional fish oil. With added antioxidant protection from astaxanthin, krill oil is becoming the preferred choice for many seeking cardiovascular, joint, and cognitive health support.

At Health Orchard, we understand the growing demand for high-quality supplements and make it easier to compare prices from trusted retailers like Walmart and iHerb. If you're considering adding krill oil to your wellness routine, here's everything you need to know about its benefits, differences from fish oil, and how to find the best product for your individual health goals. Our platform helps you make informed decisions by providing comprehensive product information and price comparisons from reputable suppliers.

What is Krill Oil?

Krill oil is extracted from Antarctic krill (Euphausia superba), a tiny crustacean found in the cold waters of the Southern Ocean. These shrimp-like creatures are an essential part of the marine food chain, providing nutrients for larger marine animals such as whales, seals, and penguins. Krill oil is prized for its rich omega-3 content, which is essential for supporting cardiovascular health, cognitive health, and joint health. Unlike plant-based omega-3s, the EPA and DHA in krill oil come in forms the body can easily use without converting them.

The distinguishing factor of krill oil is the presence of astaxanthin, a powerful antioxidant that gives the oil its reddish colour. In addition to EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), which are vital for heart and brain health, astaxanthin offers extra protection against oxidative stress. Because krill oil’s omega-3s are bonded to phospholipids, they dissolve well in the body's water-based cells, leading to improved bioavailability. This sets krill oil apart from many traditional fish oils, making it more effective at delivering omega-3 benefits with fewer capsules.

Krill Oil vs. Fish Oil: Key Differences

Absorption Efficiency

Krill oil’s superior absorption lies in its phospholipid structure. Omega-3 fatty acids in krill oil bind to phospholipids, which mimic the structure of the membranes in human cells. This feature allows the fatty acids to dissolve easily in water, enhancing their absorption through the digestive system and reducing the amount of oil needed to achieve health benefits. In comparison, the omega-3s in fish oil are stored in triglycerides, which take longer to break down, reducing bioavailability and requiring larger doses to achieve similar effects.

This increased absorption helps krill oil deliver benefits more efficiently with smaller servings, which can be an advantage for people who find it difficult to take multiple capsules. Additionally, the quick uptake of krill oil reduces the risk of gastrointestinal discomfort, a common complaint with fish oil supplements.

Astaxanthin Content

Astaxanthin is a carotenoid antioxidant found naturally in krill oil but absent in fish oil. This antioxidant provides several health benefits, including protection against oxidative damage, support for healthy skin, and improved immune function. Astaxanthin also stabilizes krill oil, preventing it from going rancid as quickly as fish oil.

Because of astaxanthin’s ability to neutralize free radicals, it may help reduce inflammation throughout the body, making krill oil particularly beneficial for individuals with inflammatory conditions like arthritis. Fish oils often require additional preservatives to maintain freshness, while krill oil stays stable for longer due to this natural antioxidant.

Reduced Fishy Aftertaste

Krill oil is less likely to cause fishy burps, a common complaint associated with fish oil supplements. This is partly because krill oil is absorbed more efficiently, reducing the chance of reflux. In addition, the phospholipid structure of krill oil makes it easier for the body to digest, which minimizes gastrointestinal discomfort.

For people sensitive to the aftertaste or those with digestive issues, krill oil can offer a more comfortable alternative. Many krill oil supplements also come in smaller, easy-to-swallow softgel capsules, which further enhances user experience. Some premium brands provide enteric-coated capsules to ensure that the oil bypasses the stomach and is absorbed in the intestines, minimizing any aftertaste.

Environmental Sustainability

Krill oil is often harvested more sustainably than fish oil due to strict environmental regulations. Krill populations are carefully monitored, and quotas are set to ensure that harvesting does not disrupt marine ecosystems. Because krill are at the lower end of the food chain and reproduce rapidly, their population is more resilient compared to certain fish species that are overfished.

Organizations like the Marine Stewardship Council (MSC) certify sustainable krill oil harvesting. Certified krill oil products guarantee that manufacturers follow responsible practices, such as avoiding fishing during breeding seasons and using eco-friendly harvesting techniques. This makes krill oil a good option for consumers concerned about environmental impact.

Health Benefits of Krill Oil Supplements

Heart Health

Krill oil has been shown to improve cardiovascular health by helping regulate cholesterol levels. Studies suggest that it can lower LDL (bad) cholesterol and triglycerides while raising HDL (good) cholesterol, reducing the risk of heart disease. The anti-inflammatory effects of EPA and DHA also help maintain healthy blood vessels and prevent plaque buildup, which can lead to atherosclerosis.

Additionally, krill oil’s omega-3 content supports healthy blood pressure by improving arterial flexibility. Regular supplementation may also reduce the likelihood of abnormal heart rhythms, which is a significant risk factor for heart attacks. People with high triglycerides or hypertension may benefit from adding krill oil to their daily regimen, though it’s essential to consult a healthcare provider first.

Joint Health

Krill oil’s anti-inflammatory properties make it an excellent supplement for managing joint pain and stiffness, particularly in conditions like rheumatoid arthritis or osteoarthritis. EPA and DHA reduce the production of inflammatory markers that contribute to joint swelling and pain, leading to improved mobility and quality of life.

Clinical studies indicate that krill oil can help decrease morning stiffness and joint tenderness in people with arthritis, making it a popular natural alternative to nonsteroidal anti-inflammatory drugs (NSAIDs). Some users report noticeable improvements within a few weeks of regular use, making it a practical choice for those looking to manage chronic joint discomfort.

Brain Function

The DHA in krill oil plays a critical role in maintaining cognitive health and supporting brain development. It is essential for cell membrane integrity in the brain and helps improve neurotransmitter function, which can enhance memory, focus, and learning ability.

Research suggests that regular omega-3 intake may reduce the risk of cognitive decline and neurodegenerative diseases like Alzheimer's. Additionally, krill oil may help alleviate symptoms of anxiety and depression by promoting the release of serotonin, a neurotransmitter associated with mood regulation.

Eye Health

Krill oil’s DHA content is beneficial for maintaining eye health, particularly as people age. DHA is a vital component of the retina, and regular intake can help prevent conditions like age-related macular degeneration (AMD) and dry eye syndrome

Supplementing with krill oil ensures the eyes receive adequate amounts of DHA, which promotes optimal vision and may reduce the risk of developing certain retinal diseases. Individuals experiencing visual fatigue from prolonged screen use may also find relief from using krill oil.

Anti-inflammatory Effects

Chronic inflammation is linked to numerous health problems, including heart disease, diabetes, and autoimmune conditions. The omega-3s in krill oil help regulate the body's inflammatory response by reducing the production of pro-inflammatory molecules.

By controlling inflammation, krill oil can improve overall health and lower the risk of chronic diseases. Many people use it as part of a long-term wellness plan to maintain optimal immune function and reduce the impact of inflammatory conditions.

Choosing the Right Krill Oil Supplement

Purity and Sourcing

When purchasing a krill oil supplement, it’s essential to select products sourced from Antarctic krill. The cold, pristine waters of the Southern Ocean ensure that the oil is free from contaminants such as heavy metals or industrial chemicals.

Look for companies that provide transparency about their sourcing practices. Some premium krill oil brands partner with organizations like the MSC to ensure that their harvesting methods align with environmental standards.

Concentration of EPA & DHA

When selecting a krill oil supplement, checking the concentration of EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) on the label is crucial. These two omega-3 fatty acids offer key health benefits, supporting cardiovascular, cognitive, and joint health. Clinical studies suggest that at least 250–500 mg of combined EPA and DHA per day is necessary to achieve noticeable improvements in heart function, triglyceride levels, and brain performance. Supplements with higher concentrations allow users to reach these targets with fewer capsules, making dosing easier and more convenient.

Not all supplements contain the same ratio of EPA to DHA. Some formulations are designed to prioritize one over the other, depending on the intended benefit—for example, DHA-focused products are often marketed for brain health, while EPA-heavy options target heart and anti-inflammatory benefits. Comparing labels and selecting a supplement with an optimal concentration ensures you receive the therapeutic benefits backed by research. Individuals with specific health concerns may need higher dosages, so consulting with a healthcare professional can help determine the right supplement for your needs.

Presence of Astaxanthin

Astaxanthin is a naturally occurring antioxidant in krill oil, giving it a distinct red hue. This antioxidant not only protects the body from oxidative stress but also enhances the stability of the krill oil itself, preventing it from turning rancid over time. Unlike fish oil, which can require additional preservatives, krill oil remains fresh longer due to the presence of astaxanthin. As a result, supplements with listed astaxanthin content provide more peace of mind when it comes to shelf life and product quality.

Astaxanthin’s antioxidant properties extend beyond product preservation. It helps neutralize free radicals in the body, potentially reducing inflammation and supporting immune function. Some research suggests that astaxanthin may offer additional skin health benefits, such as reducing UV-related damage and improving skin elasticity. When choosing a krill oil supplement, it’s recommended to look for those with transparent astaxanthin levels to ensure maximum health benefits.

Third-party Testing

Third-party testing is essential to confirm the purity, potency, and safety of krill oil supplements. Since contaminants like heavy metals and environmental pollutants can sometimes be present in marine oils, independent lab testing ensures that products meet health and safety standards. Reputable brands voluntarily undergo testing through certified laboratories to provide transparency and build trust with consumers.

Products that carry third-party certification are less likely to contain harmful additives or inaccurate ingredient claims. Verified lab tests also confirm that supplements meet their labeled EPA, DHA, and astaxanthin concentrations. Look for krill oil brands that publish lab reports or carry certifications from organizations such as NSF International or ConsumerLab to ensure you’re buying a high-quality product free from contaminants.

Softgel Design

The design of the capsule plays an important role in the user experience. Many krill oil supplements come in softgel form, making them easier to swallow compared to larger fish oil capsules. Softgels containing krill oil tend to be smaller because the phospholipid-bound omega-3s require lower doses to achieve the same effect as traditional fish oil. Smaller capsules also reduce the risk of throat discomfort or gag reflex, encouraging consistent supplementation.

To further enhance comfort, some brands offer enteric-coated softgels. This coating ensures the capsule dissolves in the intestines rather than the stomach, minimizing fishy burps or reflux, which are common complaints with standard fish oils. When selecting a krill oil supplement, it’s helpful to read product reviews that mention the ease of swallowing and any aftertaste, as this can vary between brands.

Potential Side Effects and Precautions

Mild Side Effects

While krill oil is generally safe for most people, some users may experience mild side effects. These typically include digestive issues, such as nausea, stomach discomfort, or loose stools. Burping and reflux, though less frequent compared to fish oil, may also occur if the supplement is taken on an empty stomach. Taking krill oil with food can reduce these symptoms and enhance absorption.

Starting with a low dose and gradually increasing it can help the body adjust, minimizing the likelihood of side effects. If digestive discomfort persists, switching to a brand with enteric-coated capsules or smaller serving sizes may improve tolerance. For most individuals, these side effects are temporary and mild. However, if symptoms become severe or persistent, it’s recommended to stop taking the supplement and consult a healthcare professional.

Allergy Concerns

Krill oil supplements are derived from shellfish, meaning they can trigger allergic reactions in people with shellfish allergies. Common symptoms of an allergic reaction include itching, hives, swelling, and difficulty breathing. In severe cases, anaphylaxis—a life-threatening reaction—can occur. Individuals with known shellfish allergies should avoid krill oil and consider other omega-3 sources, such as algae-based supplements.

Even those without allergies should be cautious if they experience new symptoms after starting krill oil. Some reactions may not be immediate, so monitoring for any unusual side effects during the first few weeks of supplementation is essential. If any allergic symptoms arise, discontinue use and seek medical advice immediately.

Interactions with Medication

Krill oil has mild blood-thinning properties, which can interfere with medications that affect blood clotting, such as anticoagulants (e.g., warfarin) or aspirin. This interaction can increase the risk of bleeding, especially during surgery or if the user sustains an injury. Individuals taking blood-thinning medication or preparing for medical procedures should consult their doctor before adding krill oil to their regimen.

Krill oil may also interact with other medications, including nonsteroidal anti-inflammatory drugs (NSAIDs) or blood pressure medications. Regular use of krill oil, while beneficial, should always be monitored in individuals with chronic conditions. Medical advice ensures that the supplement is safe to take alongside prescribed medications.

Pregnancy and Breastfeeding

The safety of krill oil during pregnancy and breastfeeding has not been extensively studied, which makes it essential for women in these groups to seek medical advice before supplementation. Omega-3 fatty acids are critical for fetal brain and eye development, and DHA, in particular, is often recommended during pregnancy. However, the presence of astaxanthin and the lack of long-term studies specific to krill oil require caution.

Healthcare providers can determine whether krill oil or other sources of omega-3s are appropriate for pregnant and breastfeeding women. In some cases, algae-based DHA supplements may be recommended as an alternative. If krill oil is approved, dosing should be carefully monitored to avoid excess intake.

Sustainability and Environmental Impact

Sustainable Harvesting Practices

Krill oil is often regarded as a sustainable supplement option because of strict harvesting regulations and the abundance of krill in Antarctic waters. Organizations like the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) monitor krill populations and set harvesting limits to ensure the stability of marine ecosystems. Harvesting is carefully managed to avoid overexploitation and ensure that krill remains a reliable food source for marine wildlife like whales, seals, and penguins.

Fishing companies also use specialized equipment designed to minimize bycatch and avoid disrupting the surrounding environment. By employing eco-friendly practices, these operations help reduce the ecological footprint of krill harvesting, maintaining biodiversity in the Southern Ocean. Consumers can support these efforts by purchasing products from companies that follow sustainable practices.

Environmental Concerns

Compared to fish oil production, krill harvesting has a lower environmental impact. Fish populations are often overfished, leading to ecosystem imbalances, while krill populations remain stable due to their rapid reproduction. The cold, remote location of the Southern Ocean further limits human interference, making krill harvesting a less intrusive option.

Nevertheless, consumers should remain cautious when choosing krill oil supplements to ensure they come from responsible sources. Supporting brands that adhere to sustainable practices reduces the environmental risks associated with large-scale harvesting. Checking for certifications from reputable organizations helps identify products that align with sustainability goals.

Certifications to Look For

When shopping for krill oil supplements, look for certifications that guarantee sustainable sourcing and product quality. The Marine Stewardship Council (MSC) is one of the most recognized organizations certifying sustainable fisheries, including krill operations. Products with the MSC logo ensure that harvesting practices meet strict environmental standards.

In addition to sustainability certifications, some brands undergo independent purity testing to verify that their products are free from contaminants. Certifications from third-party testing organizations like NSF International or ConsumerLab can offer additional assurance that the supplement meets safety and quality standards. Choosing certified products ensures that consumers support eco-friendly practices while receiving high-quality krill oil.

Conclusion

Krill oil supplements offer a wide range of health benefits, from supporting heart and brain health to reducing joint pain and inflammation. With better absorption, antioxidant protection from astaxanthin, and eco-friendly sourcing, krill oil is a superior alternative to traditional fish oil.

Health Orchard offers an easy way to compare supplement prices from top retailers like Walmart, Amazon, and iHerb, ensuring you get the best deal on the highest-quality products. Elevate your health with premium krill oil supplements today. Visit Health Orchard to explore our range of options, compare prices, and make an informed choice for a healthier tomorrow.

Frequently Asked Questions about Krill Oil Supplements

1. What is krill oil supplement good for?

Krill oil supplements support heart health, reduce inflammation, and improve brain function. They contain omega-3 fatty acids (EPA and DHA) in a highly bioavailable phospholipid form, plus astaxanthin, a powerful antioxidant. Krill oil may help reduce joint pain, support healthy cholesterol levels, and improve skin health.

2. What's the difference between fish oil and krill oil?

Krill oil differs from fish oil in its structure and absorption. While both contain omega-3s, krill oil's omega-3s are bound to phospholipids, making them potentially more bioavailable. Krill oil also contains astaxanthin, which acts as a natural preservative and antioxidant. However, krill oil typically has lower omega-3 concentrations and costs more.

3. Is krill oil good for kidneys?

Krill oil may benefit kidney health through its anti-inflammatory properties and omega-3 content. Some studies suggest it could help reduce inflammation in kidney tissue and support overall kidney function. However, individuals with kidney disease should consult their healthcare provider before taking krill oil supplements.

4. Is krill oil good for aging?

Krill oil can support healthy aging through multiple mechanisms. Its omega-3s and astaxanthin help protect brain function, reduce inflammation, and support cardiovascular health. The antioxidant properties may help combat oxidative stress associated with aging. It may also support joint health and maintain skin elasticity.

5. Who cannot take krill oil?

People with shellfish allergies should avoid krill oil. Those on blood-thinning medications, scheduled for surgery, or with bleeding disorders should consult their doctor before use. Pregnant or nursing women should seek medical advice. People with seafood allergies or compromised immune systems should also exercise caution.

6. Is it safe to take krill oil every day?

Daily krill oil supplementation is generally safe for most people when taken as directed. Typical doses range from 500-2000mg daily. However, it's important to follow recommended dosages and consult a healthcare provider for personalized advice, especially if you have underlying health conditions or take medications.

7. Do doctors recommend krill oil?

Many healthcare providers recommend krill oil as an alternative to fish oil, particularly for patients who need omega-3 supplementation but experience digestive issues with fish oil. Doctors often suggest it for heart health, joint pain, and cognitive function. However, recommendations vary based on individual patient needs.

8. When should I take krill oil, morning or night?

Krill oil can be taken any time of day, but taking it with meals may improve absorption and reduce potential digestive discomfort. Some people prefer morning doses to avoid fishy reflux at night. The most important factor is consistency rather than timing. Choose a time that works best with your daily routine.

9. Does krill oil raise cholesterol?

Krill oil typically doesn't raise cholesterol; instead, it may help improve cholesterol profiles. Studies suggest krill oil can help lower "bad" LDL cholesterol and triglycerides while potentially increasing "good" HDL cholesterol. The omega-3 fatty acids in krill oil, particularly in their phospholipid form, may be more effective than fish oil at supporting healthy cholesterol levels.

10. Is krill oil good for fatty liver?

Krill oil may benefit fatty liver disease through its anti-inflammatory properties and omega-3 content. Studies suggest it could help reduce liver fat accumulation and inflammation. The phospholipid structure of krill oil's omega-3s may enhance liver absorption. However, more research is needed to confirm its effectiveness for liver conditions.