O3 - Ultra Pure Fish Oil Capsules

Ultra pure and highly concentrated fish oil. Each serving contains 2000mg omega-3 and each batch is third party tested by IFOS for freshness and purity.

Size3 capsules a day, 40 day supply

Directions for use
For adults 11 years and up take 3 softgels daily, preferably with a meal or as recommended by a physician.

As with any dietary supplement, consult your healthcare practitioner before using this product, especially if you are pregnant, nursing, anticipate surgery, take medication on a regular basis or are otherwise under medical supervision.

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15% discount on subscriptions

You have the option to choose monthly auto-renewal with 15% discount on the individual product pages. For subscription just choose the product(s) you want, tic the subscription box and your order will auto-renew every month plus you get 15% off. You will never have to worry about running out of supplements again and you save money.

Managing your subscription is very easy. In your account under Manage Subscription you can add/remove products to/from your subscription, update payment and shipping details and skip deliveries. So if you find yourself with too much left from your last order you simply skip a shipment, no need to cancel your subscription. However if you wish to cancel your subscription that is also very easy. Anytime and with no strings attached.

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Easy absorbable

Effective dosage

No artificial ingredients

Always third-party tested by Cleanlabelproject.org

Test results published for full transparency

Benefits of O3 - Ultra Pure Fish Oil Capsules

Omega-3 is an essential nutrient which means that humans need it from the diet. Most of the population don’t get enough to balance the high intake of omega-6 in the typical western diet. Read more

Heart Health

Numerous studies have demonstrated the beneficial effects of omega-3s especially from marine sources on cardiovascular health both in patients with cardiovascular disease and in healthy persons, correlating a higher consumption of fish with a lower frequency of cardiovascular disease.* Read more

Brain & Vision

Omega-3 and omega-6 balance

Key Ingredients

Fish Oil

Fish Oil

Clean and fresh fish oil from sustainable and wild caught anchovies from the South-Pacific Ocean.

Natural Lemon Flavor

Natural Lemon Flavor

Natural lemon flavor from real lemons gives O3 a great fresh smell and taste.

Vitamin E

Vitamin E

Natural extracted vitamin E is added to the fish oil to make sure it stays fresh - a very common addition in most fish oil products.


Product Information

Why did we make O3?

Puori O3 was the first product – our hero. Our founders created the product because every time they bought fish oil, they experienced nasty fish burps, which they learned was due to the fact that the oil was rancid. They couldn’t trust other products were clean and fresh because they had no 3rd party certifications, so our founders started producing O3 fish oil and getting it certified.

Ingredient History

The raw fish oil is sourced from wild caught anchovies in the Pacific Ocean. Our fish is caught with FOS certified fishing methods, securing by-catch, environmental and sustainability ethics.
The anchovies used are wild caught and the plant processing the oil is located right off the shore, which allows for a quick processing time and secures a fresher end-product.
IFOS test each batch for environmental contaminants, including heavy metals, PCBs, dioxins, furans and dioxin-like PCBs. These accumulate in fat, and oil derived from fish may therefore contain these contaminants that may have negative health effects. IFOS also measures oxidation and rancidity to ensure that the fish oil is stable and fresh for consumption.

Consumption and Storage

Ingredients / Allergens

Shipping & Delivery

Full transparency with Clean Label

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Full Transparency with Clean Label

We strive to make the cleanest products and test all product batches. The test results can be viewed on Clean Labels using the respective batch number
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Heavy Metals







Read our blog posts about fish oil

We have multiple blog posts about our supplements including recipes. Have a look for yourself.
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Customer Reviews

Based on 478 reviews
Christa Snodgrass

O3 - Ultra Pure Fish Oil Capsules

Ana Venturini-Eichenfeldt
No fish taste

This is the only omega 3 that doesn’t give me fish burps.

Tcbnewman@mac.com Newman
Only the best Dha and EPA omegas

I’ve been Puori since the days when they were known as Pure Pharma. They have always delivered the highest quality product especially when it comes to omegas. It’s very important to know the source of your supplements, they have always delivered!

Marco H.
Top Omega 3

Excellent quality of omega 3, the best I've tried by far. As an athlete, it helps me with post-workout inflammation and keeps my lipid profile in excellent range.
Good smell, good taste, without any fishy aftertaste.

GG from Pittsburgh, PA
Great Product & Safe to use

I have been using the O3 Fish oil for over 10 years. I love what it does for me (I use it to help with cardiovascular disease prevention). Since I take it at high dosages, it’s very important to me that I use a quality product that is safe to use (certified no mercury). Thanks for making a great product!

Clean Label ®

Transparency project

Clean Label Project™ uses data and science to reveal the true contents of America’s best-selling consumer products. Products are tested in an accredited analytical chemistry laboratory for 130 harmful environmental and industrial contaminants and toxins. Results are published online.

See all Puori product tests