Krill Oil vs Fish Oil Comparison

Krill oil vs fish oil - which is better, and what are the advantages of each?

Safety and Pollutants

With the increasing levels of industrial waste being released into sea water, the amount of pollutants consumed by fishes, especially those that contain substantial amount of fat tissues, is extremely alarming. The levels of mercury released into sea water and in turn found in some medium and big-sized fishes is at an all-time high, making it extremely undesirable to go in for these fishes or products prepared using these fishes.

Therefore, fish oil, especially those prepared using bigger fishes like sharks and sword fishes, contain high levels of toxins like mercury and other pollutants like PCBs, lead, chromium, strontium, and arsenic. This reality makes smaller fishes and their products healthier and less toxic.

Smaller fishes like sardines and herring do not contain alarming levels of mercury and other contaminants in their body tissues, making them relatively safer. The same thus also applies to krill oil; krill, after all, is a very small sea organism.

Indeed, krill are extremely tiny in size and cannot store toxins, especially very harmful ones like mercury, within their system, and thus are less contaminated and toxic as compared to their bigger counterparts. This is one big plus for krill in the krill oil vs fish oil comparison.


The next issue in the krill oil vs fish oil debate is the presence of antioxidants.

Another advantage that krill oil has over fish oil is the amount or levels of antioxidants present in it. While it is important to increase the level of omega 3 fatty acid intake, it is equally important to increase the antioxidant levels in the body. At the same time, antioxidants also help protect the oil and prevent it from going bad too easily.

The truth is that fish oil generally contains high levels of omega 3 fatty acids but it lacks antioxidants. Fish oil has limited life and can actually easily oxidize once consumed - this increases the amount of free radicals within the body. As you probably already know, free radicals are highly unhealthy and can cause several disease conditions, including cancer.

For this reason, when consuming oils for their omega 3 content, it is very important to consider the amount of antioxidants present in them as well. In this regard, as we look at krill oil vs fish oil, we find that krill oil is very well balanced as compared to fish oil - krill oil has good amounts of both antioxidants and omega 3 fatty acids. This makes krill oil a good source of both these types of very important nutrients.

The omega 3 fatty acids, phospholipids, and antioxidants contained in krill oil are bound together, which prevents it from oxidizing. It is also easily imbibed by the human body, thereby increasing the intake of healthy fatty acids like EPA and DHA, which do not get oxidized easily.

This is one more advantage for krill in the krill oil vs fish oil discussion.

Durability and Lifespan

Scientific data also indicates that the omega 3 fatty acids contained in krill oil continues to stay unchanged over extended periods of time, thereby preserving more of its useful characteristics and properties. Thus, the ability of krill oil to keep its biochemical properties intact makes it a better choice as compared to fish oil, which cannot preserve its beneficial properties for long.

Krill oil vs fish oil - one more plus point for the former.

Other Important Nutrients, Including Astaxanthin

In addition to the abovementioned points, krill oil also contains vitamins A, D, and E, as well as canthaxanthin like astaxanthin, which is an antioxidant that is over 40 times more effective than antioxidants contained in fish oil.

One of the superior qualities of the antioxidant astaxanthin is that it provides strong defense against ultraviolet radiation, which can cause severe skin problems, including cancer. The presence of this antioxidant in krill oil also helps reduce the fish-like tang or flavor feeling experienced after consuming fish oil.

Again, in the krill oil vs fish oil dilemma, krill scores more points.

Conclusion - Krill Oil vs Fish Oil

Thus, in concluding this krill oil vs fish oil comparison, it would seem that krill oil is considered to be far more beneficial as compared to fish oil.

In terms of health benefits, krill oil may well be the better choice - it has the ability to not lose its beneficial properties over time, high levels of potency, negligible levels or absence of toxic pollutants, antioxidant properties, as well as no fishy aftertaste after consumption.

Of course, purified fish oil can still do a pretty decent job as far as your omega 3 fatty acid needs are concerned.

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