Onnit Krill Oil Review – How Does It Compare?

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By Jack Cincotta, MS

Reviewed by Juliana Tamayo, MS, RDN - Last Updated

Onnit Krill Oil Review

Fish oil supplements are certainly popular these days, but have you heard of their “cousin,” krill oil? 

While krill oil might not get as much love right now, the trend may change since it is actually loaded with quite a few benefits too. 

And in this article, we’ll take a look at a supplement called Onnit Krill Oil to see what benefits it may have over traditional fish oil, as well as the overall product quality. 

So, continue reading this Onnit Krill Oil review as we go over this supplement’s description, its ingredients, possible benefits, and who could ultimately benefit from it. 

onnit krill oil

About Onnit Krill Oil

Onnit Krill Oil is an omega-fatty acid supplement created by Onnit. In addition to Onnit Krill Oil, this well-known company has produced many other popular supplements, including Total Human, Alpha Brain, Plant-Based Protein, HydraTech Instant, New Mood, Total Gut Health, Vitamin D3, Shroom TECH Sport, and more. 

Their Krill Oil supplement is, as they say, “like fish oil, only better.” They use sustainably sourced krill from the frigid Antarctic waters, which is rich in essential fatty acids and astaxanthin, the latter of which is not found in regular fish oil

Plus, krill oil is said to contain far less contaminants than fish due to their shorter lifespan and location far away from industrial contamination.

All in all, Onnit Krill Oil is made to be a healthier, safer, and more effective product than regular fish oils

Onnit Krill Oil Benefits

The main benefits of Onnit Krill Oil include:

  • Enhanced Brain Health
  • Better Heart Health
  • Improved Joint Health
  • Antioxidant Effects
  • Better Sustainability and Safety
onnit krill oil focus collection

Enhanced Brain Health

With high amounts of EPA, DHA, and phospholipids, Onnit Krill Oil is advertised to support brain health and cognitive function. And they say that the phosphatidylcholine in krill oil supports brain health more efficiently than the triglycerides in fish oil. 

Better Heart and Joint Health

Onnit Krill Oil is also promoted to support heart and joint health due to the anti-inflammatory nature of omega-3s, as well as astaxanthin. 

Antioxidant Effects

Additionally, Onnit Krill Oil is advertised to offer antioxidant effects, largely due to a carotenoid compound called astaxanthin, which isn’t found in regular fish oil. This is also supposed to support all-around cellular function. 

Sustainability and Safety

Lastly, Onnit Krill Oil is marketed as a more sustainable and safer alternative than fish oil.

The krill in Onnit Krill Oil are harvested in pristine waters, and since they also have a shorter lifespan than fish, this reduces the chance for contaminant build-up, leading to a safer, less toxic product.

Moreover, the krill are harvested in a way that is sustainable and limits any damage done to the natural ecosystem in the Antarctic. 

So, is Onnit Krill Oil really a healthier, safer, and more effective fatty acid supplement than fish oil? And what benefits may it have to offer? 

To find the answers to these questions, continue reading!

Onnit Krill Oil Ingredients

There’s really just one ingredient in Onnit Krill Oil…krill oil! And then, it lists the individual components that krill oil provides, including phospholipids, omega-3 fatty acids, and astaxanthin. 

onnit krill oil supplement facts

Krill Oil

So, what’s the deal with krill oil? Does it have any benefits?

Well, one of the main features of krill oil is its high phospholipid content, which is integrated with EPA and DHA omega-3 fatty acids. 

Plus, krill oil is rich in astaxanthin, vitamin A, flavonoids, tocopherols, and other micronutrients. 

Fatty Acid Profile

And research has shown that the combination of EPA/DHA in the form of phospholipids makes krill oil more efficient than fish oil at elevating fatty acid levels in the brain and other parts of the body, which potentially means greater health benefits.


Additionally, the astaxanthin found in krill oil is known to be a powerful free radical scavenger, so it offers antioxidant and anti-inflammatory effects associated with many health benefits.

Plus, the astaxanthin in krill oil actually makes it effective for prolonging shelf life and product quality.

Overall Benefits

The main benefits of krill oil supplementation include anti-inflammatory effects, cardiovascular disease prevention, neuroprotection, and even some anticancer effects.

Recommended Dose: 1,000 to 3,000mg

Does Onnit Krill Oil Work?

As of now, it’s safe to say that Onnit Krill Oil is likely a solid fatty acid supplement to improve some aspects of health and wellness. 

onnit krill oil does it work

They use a modest but still effective dose of krill oil, which has been shown to deliver antioxidant, anti-inflammatory, brain-boosting, heart-protecting, and joint-supporting effects. 

The EPA/DHA content seems to be low at first glance, but it has a much higher bioavailability than fish oil, so not as much is needed. Although, a higher dose is better in some cases (see the next section). 

And the astaxanthin content in krill oil offers a one-up on fish oil, so this definitely should be a solid supplement. 

Claims vs. Reality

In all likelihood, Onnit Krill Oil should be able to support brain, heart, and joint health, while also delivering antioxidant effects. 

However, it’s important to understand that not everyone will benefit from the same dose; some people may need more than others. 

The dose of 1,000mg may be enough for general support in the aforementioned areas, but if you’re looking to specifically improve cognitive function, reduce depression, or greatly reduce the risk of cardiovascular disease, the dose sometimes needs to be 2,000 to 3,000mg per day. 

In those cases, it may be better to pick a more potent supplement, such as Carlyle Antarctic Krill Oil

And also, keep in mind that the effects will likely take some time to develop; most likely at least a few weeks up to several months before maximum effects occur.

Lastly, krill oil is just one part of a healthy diet and lifestyle, so it won’t really do much for brain health, heart health, or other things if you have a crappy diet, never exercise, don’t get much sleep, etc. 

Who is Onnit Krill Oil Best For?

Onnit Krill Oil is best for people looking for a high-absorption fatty acid supplement to aid their overall health and wellness, especially brain function, heart health, and joint health. 

onnit krill oil best for

Is Onnit Krill Oil Safe?

Some possible side effects of Onnit Krill oil include:

  • Bad breath/fishy taste
  • Upset stomach, heartburn, nausea, bloating, etc.
  • Allergic reactions

Onnit Krill Oil is gluten-free, soy-free, and non-GMO, but it contains crustacean shellfish (krill). 

It is also third-party tested for purity, Informed Sport Certified, and BSCG Certified Drug-Free.

Additionally, the supplier of krill for Onnit Krill Oil is certified by Friend of the Sea, which ensures sustainable fishing practices.

How to Take Onnit Krill Oil

Take two soft gels of Onnit Krill Oil daily, preferably with food. 

Where to Buy Onnit Krill Oil

You can buy Onnit Krill Oil on the official Onnit website at this link.

onnit krill oil where to buy

Each bottle of Onnit Krill Oil has 30 servings (60 soft gels). The regular price is $29.95 ($1.00/serving), or you can get 15% off by choosing the Subscribe & Save option, which lowers the price to $25.46 ($0.85/serving). 

Krill oil is a little bit more expensive than fish oil per serving, but with the price per serving still under a dollar, this is definitely affordable for most. 

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Final Verdict: Onnit Krill Oil Review

In conclusion, Onnit Krill Oil definitely seems to be a fatty acid supplement worth buying. It has a pretty solid dose of krill oil and gives you a wide range of health-boosting ingredients in bioavailable forms, including EPA, DHA, phosphatidylcholine, and astaxanthin.

 Plus, it has a higher safety profile and is more sustainable than some fish oils. 

So, if you want to make the switch, or are just trying to start out incorporating fatty acid supplements, consider Onnit Krill Oil.

Overall Rating:
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Jack Cincotta, MS

Jack Cincotta is a certified holistic health coach through AFPA and a board-certified holistic health practitioner through AADP. He has written hundreds of articles on nutrition and supplementation. Jack has a M.S. degree in Psychology and is passionate about researching the science behind nutrition. He often uses research-backed supplementation protocols for many of his clients to optimize results.