Naturalis Ultra rTG Omega-3 Fish Oil 1800mg

Highly Purified rTG Fish Oil from New Zealand

Clinically Studied

one of nature's most-researched carotenoids

Third-Party Tested

every batch verified for purity & potency

Clean Formula

non-GMO, gluten-free, no fillers or additives

Made in the U.S.

cGMP manufactured in California

Clinically Studied

one of nature's most-researched carotenoids

Third-Party Tested

every batch verified for purity & potency

Clean Formula

non-GMO, gluten-free, no fillers or additives

Made in the U.S.

cGMP manufactured in California

Triple Action Fish Oil for Daily Wellness

Sourced from wild New Zealand tuna and enhanced with Astaxanthin for its distinctive natural dark red color

High-Potency Omega-3 Support

Delivers full-spectrum EPA, DHA, and DPA to support heart, brain, and eye health.

Antioxidant Protection

Enhanced with astaxanthin and vitamin E to help protect omega-3 oils from oxidation and support overall wellness.

High-Potency Omega-3 Support

Delivers full-spectrum EPA, DHA, and DPA to support heart, brain, and eye health.

Antioxidant Protection

Enhanced with astaxanthin and vitamin E to help protect omega-3 oils from oxidation and support overall wellness.

WHAT TO EXPECT

Your Cell & Body, Week by Week

Nutrients Build Up in Your System Over Time Here's a typical timeline of what you may experience with consistent daily use.

WEEK 1

EPA and DHA from fish oil begin incorporating into cell membranes throughout the body to support healthy cellular function.*
Astaxanthin helps protect the delicate omega-3 oils from oxidation while providing antioxidant support.*
Starts replenishing omega-3 levels that many diets lack.*

WEEK 2

Growing omega-3 levels help support healthy cardiovascular function and circulation.*
EPA and DHA continue supporting healthy cell-to-cell communication throughout the body.*
Astaxanthin provides additional antioxidant protection against everyday oxidative stress.*

WEEK 3

Ongoing omega-3 intake supports healthy brain and cognitive function.*
DHA helps maintain healthy vision and eye comfort during daily screen use.*
EPA and astaxanthin work together to support joint comfort, mobility, and recovery from physical activity.*

WEEK 4

Omega-3s have become integrated into cell membranes throughout the body, helping maintain long-term heart, brain, eye, and joint health.*
Astaxanthin continues supporting healthy aging through antioxidant protection at the cellular level.*
Consistent supplementation helps maintain a strong foundation for overall wellness and healthy aging.*

Carefully Selected Nutrients Designed to Work with Your Body

Astaxanthin

A carotenoid antioxidant that helps support cellular protection, healthy skin, eye health, and recovery from everyday oxidative stress*

EPA

A long-chain omega-3 fatty acid that supports cardiovascular health and a healthy inflammatory response*

DHA

A long-chain omega-3 fatty acid that supports brain, eye, and nervous-system structure and function*

DPA

A long-chain omega-3 fatty acid that complements EPA and DHA for full-spectrum omega-3 support*

GOOD TO KNOW

Frequently asked questions

What does “rTG” fish oil mean?

“rTG” stands for re-esterified triglyceride. This is a highly refined form of fish oil where omega-3 fatty acids are converted back into their natural triglyceride structure after purification. Known for better absorption and higher bioavailability.*

Why is your fish oil dark in color?

Naturalis rTG fish oil has a dark red color because it contains astaxanthin. The inclusion of astaxanthin may also give the oil a mild ‘seaweed-like’ scent, as it is derived from natural microalgae.

Is your fish oil third-party tested?

Yes, all Naturalis fish oil products undergo third-party testing for purity, stability, and safety. This rTG fish oil is certified by IFOS, ensuring it meets strict global quality standards.

What is the purpose of adding astaxanthin and vitamin E to your fish oil?

Astaxanthin and vitamin E are added as antioxidants. They mainly aim to help the fish oil preserve freshness and potency. They also provide some extra benefits with their antioxidant nature.

Is the astaxanthin in your fish oil natural or synthetic?

The astaxanthin used is 100% naturally sourced from microalgae. It is cultivated in a closed tubular system, which prevents contamination from open seawater.