Nordic Naturals vs NOW Foods Omega-3 (2026): TG vs Ethyl Ester
Informational comparison of label data and cost — not medical advice. Prices are live per-serving figures; formulas are each brand's published Supplement Facts.
This is a form-and-price trade-off, not a close call on quality. Nordic Naturals Ultimate Omega (rTG form, IFOS 5-Star, 1,100mg EPA+DHA/serving) is the better-absorbed, better-verified product. NOW Foods Ultra Omega-3 (ethyl ester, no certification, 750mg EPA+DHA/serving) costs a fraction as much per day. Pick Nordic for form and verification; pick NOW Foods for price, and take it with food.
The numbers, side by side
| Nordic Naturals Ultimate Omega | NOW Foods Ultra Omega-3 | |
|---|---|---|
| EPA+DHA/serving | 1,100mg (EPA 650mg + DHA 450mg) | 750mg (EPA 500mg + DHA 250mg) |
| Form | Re-esterified triglyceride (rTG) | Ethyl ester (EE) |
| Serving size | 2 softgels | 1 softgel |
| Servings/container | 90 | 180 |
| Certification | IFOS 5-Star | None |
| Price | $64.56 | $28.94 |
| Cost/day | $1.43 | $0.48 |
Prices are live Amazon buy-box figures (Creators API, July 2026) ÷ pack serving count. EPA/DHA breakdown and form from each brand's published Supplement Facts panel.
The real difference: the form your body has to work with
Nordic Naturals Ultimate Omega uses re-esterified triglyceride (rTG) — the form fish naturally carry omega-3 in, and the one comparative bioavailability research finds is absorbed roughly 70% better than ethyl ester (Dyerberg 2010, PMID 20638827). It also carries IFOS 5-Star certification, testing for potency (does the EPA+DHA match the label?), oxidation (is the oil fresh or rancid?), and contaminants (mercury, PCBs, dioxins) — the fish-oil-specific concerns that generic certifications like USP or NSF don't cover.
NOW Foods Ultra Omega-3 uses ethyl ester (EE), a cheaper synthetic intermediate created during concentration that your body must convert back to triglyceride before use — a conversion that's incomplete. It carries no third-party certification. What it does have going for it: molecularly distilled, enteric coated to reduce fish burps, and priced at a fraction of Nordic's cost per day. Taking ethyl ester with a fat-containing meal meaningfully improves its absorption and narrows the gap with TG form.
Who each one is for
Choose Nordic Naturals if you want the better-absorbed rTG form, IFOS 5-Star verification of freshness and potency, and more EPA+DHA per serving — and you're willing to pay for it.
Choose NOW Foods if budget is the priority and you're comfortable with ethyl ester's lower absorption, taken consistently with a fatty meal to help close the gap.
Choose neither if you want the cheapest fish oil that still hits a full clinical dose in one serving — see our full omega-3 rankings for the rTG option that does both.
Our picks
rTG form, IFOS 5-Star, 1,100mg EPA+DHA/serving. $1.43/day.
Ethyl ester, enteric coated, 750mg EPA+DHA/serving. $0.39/day.
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Frequently asked questions
Is Nordic Naturals or NOW Foods fish oil better?
Nordic Naturals is higher quality on paper — rTG form (~70% better absorbed than ethyl ester) and IFOS 5-Star certified. NOW Foods is ethyl ester with no certification, but costs a fraction as much per day. Nordic wins on form and verification; NOW wins on cost.
What's the difference between Nordic Naturals and NOW Foods omega-3?
Form is the biggest gap: Nordic uses re-esterified triglyceride, NOW Foods uses ethyl ester. Nordic also delivers more EPA+DHA per serving (1,100mg vs 750mg) and carries IFOS 5-Star certification that NOW Foods lacks.
Is NOW Foods fish oil ethyl ester or triglyceride?
Ethyl ester (EE) — the cheaper, more common form in budget fish oils, roughly 70% less absorbed than triglyceride in head-to-head studies. Taking it with a fatty meal narrows that gap considerably.
Is Nordic Naturals worth the extra cost over NOW Foods?
If IFOS-certified freshness/potency testing and better-absorbed rTG form matter to you, yes — that's what the roughly 3.7x price difference buys. If budget is the priority, NOW Foods with a fatty meal is a reasonable trade-off.
Related
- Best fish oil supplements — all products ranked by cost per 2000mg clinical dose
- Triglyceride vs ethyl ester — the full absorption evidence
- All omega-3 products
Sources
- Dyerberg J, et al. "Bioavailability of marine n-3 fatty acid formulations." Prostaglandins Leukot Essent Fatty Acids. 2010;83(3):137-141. PMID: 20638827
- Product labels: Nordic Naturals Ultimate Omega, NOW Foods Ultra Omega-3, manufacturer Supplement Facts panels, plus live Amazon pricing, July 2026.