O3 - Ultra Pure Fish Oil Capsules

This fish oil will never give you fishy burps. We know that because IFOS tests and certifies every batch to make sure the oil hasn’t oxidated and gone rancid.

It will give you: 2000mg of Omega-3 per serving with 1250mg EPA and 500mg DHA.​ ​

Every batch of Puori O3 is third-party tested and certified by The Clean Label Project® against 200+ contaminants. For your peace of mind.

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.

Buy methods

Subscription details

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.

Read more about subscriptions here

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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.

Organic Lemon Oil

Organic Lemon Oil

Organic lemon oil 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 The Clean Label Project®

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Full Transparency with The Clean Label Project®

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
See test results

Heavy Metals







Read our blog posts about fish oil

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

Customer Reviews

Based on 502 reviews

O3 - Ultra Pure Fish Oil Capsules

Haley Brancheau
Noticing a difference!

I’ve truly started to notice a difference in my skin and hair. I absolutely LOVE the fact that I do not have any fishy burps after taking it each day. I truly believe this is the very best fish oil on the market. So happy I came across this product.

Great product!

I have been taking ultra pure fish oil for two months now and I am very happy with this product. The capsules are easy to swallow and never have a fishy smell or taste.

Jennifer Hill-Hyman

O3 - Ultra Pure Fish Oil Capsules


Best fish oil out there.

The Clean Label Project ®

Transparency Promise

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