The TL;DR:

• In the krill oil vs fish oil comparison, the key difference lies in structure: fish oil carries its omega-3s in triglyceride form, while krill oil carries a large portion in phospholipid form, a difference that may allow krill oil to achieve comparable omega-3 absorption at a lower dose.
• Potential krill oil benefits include cardiovascular wellness, inflammation management, brain and cognitive function, and hormonal health during PMS.

Researching krill oil vs fish oil raises questions among health-conscious consumers looking for the best omega-3 fatty acid supplements for long-term well-being. While fish oil has served as the primary choice for decades, oil harvested from Antarctic krill is rapidly gaining prominence. Understanding how these two marine sources differ in their molecular composition, absorption rates, and bioavailability gives you the information you need to make an informed decision.  

For South Africans looking for an omega-3 supplement that aligns with a whole-food philosophy, the source of your supplement matters as much as the dose. At FoodGrown, our philosophy centres on delivering nutrition as nature intended, using only 100% natural, food-grown vitamins that work in tandem with your body. 

If you are interested in learning more about how food-grown nutrition benefits your health, we encourage you to explore our range. 

Krill Oil vs Fish Oil: What is the Real Difference?

Both krill oil and fish oil provide omega-3 fatty acids, particularly EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). These fats play an important part in cellular health and are commonly associated with cardiovascular, cognitive and visual well-being. The main difference between the two is the source.

Fish oil is typically extracted from oily fish such as sardines, anchovies, salmon, and mackerel. Krill oil is derived from Antarctic krill, which are tiny shrimp-like marine organisms that occupy a vital position in the ocean food chain. While both contain EPA and DHA, their molecular structures differ significantly.

Fish oil carries omega-3 fatty acids in triglyceride form. Krill oil carries a large portion of its omega-3 content in phospholipid form. This distinction has attracted considerable scientific interest because phospholipids are naturally found in human cell membranes. 

What Does Bioavailability Have to Do With Supplements?

Bioavailability refers to the degree to which a nutrient can be absorbed and used in the body. So why would it matter in a supplement? Many people who ingest supplements focus only on the amount of omega-3 listed on a label. However, absorption may be just as important as the dosage.

Several studies have explored the bioavailability of krill oil compared with fish oil. They have found that a lower dose of krill oil may produce omega-3 blood levels comparable to higher doses of fish oil in some individuals. Scientists believe this may be linked to the phospholipid structure found in krill oil. As cell membranes are also rich in phospholipids, these fatty acids could be absorbed efficiently into body tissue.

This does not mean fish oil is poorly absorbed. Quality fish oil omega-3 products remain highly effective and are backed by decades of research. The distinction is that krill oil may offer enhanced absorption at lower dosages.

Krill Oil Contains Naturally Occurring Antioxidants

One of the distinguishing features of krill oil is its naturally occurring astaxanthin content − a powerful antioxidant responsible for the characteristic red colour of krill.

Antioxidants help protect cells against oxidative stress, which occurs when free radicals and antioxidants become imbalanced in the body. Oxidative stress is a natural part of everyday life and may be influenced by factors such as ageing, environmental exposure, and lifestyle habits.

Emerging studies have investigated the antioxidant and anti-inflammatory properties of astaxanthin, with findings suggesting it may contribute to cardiovascular wellness and overall cellular health. While research is ongoing, the presence of this naturally occurring compound remains one of the most notable features that sets krill oil apart from other fish oil supplements. 

Why are Omega-3 Fatty Acids so Important in a Diet?

Omega-3 fatty acids are classified as essential fats because the body cannot produce adequate amounts independently. Diet patterns frequently contain significantly higher levels of omega-6 fats, like vegetable and plant oils, compared to omega-3s. For this reason, many adults find ways to increase their omega-3 intake through supplements, such as those from FoodGrown. 

What are the Most Notable Benefits of Omega-3 Supplements?

Krill oil and fish oil contain EPA and DHA, the essential omega-3 fatty acids that many people do not consume in sufficient quantities through diet alone. 

1. Contributing to cardiovascular wellness
   Omega-3 fatty acids have long been praised for their role in heart health. Research suggests these acids may contribute to maintaining healthy triglyceride levels and support overall cardiovascular function as part of a healthy lifestyle. 
   
   
2. Assisting normal cognitive function
   DHA is a major structural component of the brain. Adequate omega-3 intake could contribute to healthy cognitive performance, memory, and concentration throughout different stages of life.
   
   
3. Helping maintain a healthy inflammatory balance
   Omega-3 fatty acids aid in the body’s natural inflammatory process. An appropriate balance between omega-3 and omega-6 fatty acids may contribute to overall well-being and healthy physiological functioning.
   
   
4. Providing antioxidant activity through naturally occurring astaxanthin
   Unlike fish oil, krill oil naturally contains astaxanthin. Researchers continue to explore its potential role in protecting cells against oxidative stress associated with everyday environmental and metabolic factors.
   
   
5. Contributing to eye health and visual function
   DHA is found in high concentrations in the retina. Consuming adequate amounts of omega-3 fatty acids could contribute to eye health and visual performance. 
   
   
6. Hormonal and menstrual health
   Research has examined how krill oil can aid in managing the symptoms of PMS (premenstrual syndrome). It was found that women taking krill oil reported reduced emotional and physical discomfort during their cycle compared to those taking fish oil; a finding that suggests krill oil may be particularly relevant for women’s hormonal wellness.
   
   
7. Improved skin health
   Omega-3 fatty acids, particularly EPA and DHA, contribute to maintaining healthy-looking skin. EPA could help promote a balanced skin renewal process and contribute to a more youthful-looking complexion by helping protect against environmental stressors associated with premature ageing.
   

Researchers continue to investigate these areas. While findings are encouraging, individual results may vary. Krill oil should be viewed as part of a broader wellness strategy that includes a balanced diet, regular physical activity, quality sleep, and healthy lifestyle habits.

So, Which Omega-3 is Actually Better?

There isn't a single answer that suits everyone, but the two oils tend to suit slightly different priorities. Krill oil may be the better fit if you're looking for a lower daily dose, easier absorption, or the added antioxidant support of astaxanthin. Fish oil may be the better fit if your priority is a higher concentration of EPA and DHA per capsule, backed by decades of established research. Both remain effective ways to increase your omega-3 intake, and the right choice depends on matching the oil's strengths to your own wellness goals.

How FoodGrown Aligns with a Natural Wellness Philosophy

Rather than focusing solely on isolated nutrients, we at FoodGrown emphasise food-grown vitamins, natural vitamins, and non-synthetic health supplements designed to work in harmony with naturally occurring nutritional co-factors. Our philosophy reflects the belief that nutrients alongside complementary compounds could offer more benefits than highly processed alternatives.

Manufactured in SAHPRA-accredited facilities, FoodGrown’s product line is developed with carefully selected ingredients that are gluten-free, non-GMO, and responsibly sourced with quality and sustainability in mind. Both our Pure Krill Oil and Omega-3 supplements are responsibly sourced and certified by Friend of the Sea, reflecting a commitment to sustainable marine practices and environmental stewardship.  Our focus will always be on providing a cleaner, 100% natural, food-grown option. 

Choosing between krill oil vs fish oil ultimately comes down to your own wellness goals and how your body responds to each. FoodGrown's Pure Krill Oil brings together phospholipid-bound omega-3s and naturally occurring astaxanthin in a single soft-gel capsule, and is available exclusively through Dis-Chem, in-store and online, nationwide.

Shop FoodGrown Pure Krill Oil at Dis-Chem.

Learn more about FoodGrown's natural, food-grown vitamins.

 

FAQs About Krill Oil

Q: Does krill oil cause the same aftertaste as fish oil? 

A: No, the common issue of a fishy aftertaste is largely absent with krill. Because the omega-3s are bound to water-soluble phospholipids, they mix immediately with your stomach contents rather than sitting on top of the gastric juices, eliminating the floating layer of oil that typically causes reflux and repeating.

Q: Can I take krill oil capsules if I have a known seafood allergy? 

A: Because krill are small crustaceans, individuals with diagnosed shellfish allergies should exercise caution. It is always recommended to consult with a qualified healthcare professional before introducing any crustacean-derived product into your daily routine if you have known sensitivities to fish or seafood.

Q: How can I be certain that my supplements are manufactured safely? 

A: To ensure maximum safety, purity, and legal compliance, always choose brands that manufacture their products inside SAHPRA-accredited facilities. This guarantees that every batch undergoes rigorous quality control standards, heavy metal screening, and strict adherence to top manufacturing practices.