I tested six of the most popular omega-3 supplements over 90 days with baseline and follow-up bloodwork. EPA+DHA content, molecular form (triglyceride vs. ethyl ester), IFOS certification, GI tolerance, and price per serving were all evaluated.
What this review covers:
Nordic Naturals Ultimate Omega, Ritual Essential Omega-3, Momentous Omega-3, Thorne Super EPA, iwi Life Omega-3, and Nature Made Fish Oil. 90-day bloodwork tracking omega-3 index. All products purchased at retail.
Nordic Naturals Ultimate Omega
"The benchmark everything else gets measured against."
1,280mg EPA+DHA per serving in triglyceride form. IFOS 5-star certified. Zero fishy burps across 90 days. Omega-3 index improved from 5.1% to 8.4%, reaching the clinically meaningful 8-12% target range. ~$40/month.
Pros
- High EPA+DHA (1,280mg) in triglyceride form
- IFOS 5-star certified with published results
- No fishy aftertaste, pleasant lemon flavor
- Measurable omega-3 index improvement in bloodwork
Cons
- Softgels slightly large
- Not the cheapest per bottle
- Not vegan
Thorne Super EPA
1,390mg EPA+DHA, triglyceride form, NSF Certified for Sport. EPA-forward formula ideal for inflammation focus. Omega-3 index: 5.3% to 8.1%. Most expensive at ~$1.00/serving (~$55/month).
Momentous Omega-3
1,100mg EPA+DHA, triglyceride form, NSF Certified for Sport. Omega-3 index: 5.0% to 7.7%. ~$0.83/serving. Strong performer; slightly outclassed by Nordic Naturals at a higher cost.
Ritual Essential Omega-3
100% vegan, algae-derived. 1,160mg omega-3 (800mg DHA, 360mg EPA) in re-esterified triglyceride form. No fishy aftertaste. Omega-3 index: 5.2% to 7.4%. Best choice for vegans. ~$45/month.
iwi Life Omega-3
Algae-derived, grown in inland ponds (exceptional sustainability). Phospholipid form, 300mg EPA+DHA per serving. Omega-3 index: 5.0% to 6.8%. Best eco-story; low absolute dose may limit results. ~$36/month.
Nature Made Fish Oil
720mg EPA+DHA in ethyl ester form. USP Verified. Omega-3 index: 5.1% to 6.5%. Dramatically cheaper at ~$0.10/serving but ethyl ester bioavailability gap is real and measurable in bloodwork.
70%
Nordic Naturals uses triglyceride form, absorbed up to 70% better than ethyl ester form found in most pharmacy fish oils.
Source: Dyerberg J, et al. (2010). Prostaglandins, Leukotrienes and Essential Fatty Acids.
Full Comparison
| Product | EPA+DHA | Form | Certified | Price/Month | Index Change |
|---|---|---|---|---|---|
| Nordic Naturals Ultimate Omega ★ | 1,280mg | Triglyceride | IFOS 5-star | ~$40 | 5.1% → 8.4% |
| Thorne Super EPA | 1,390mg | Triglyceride | NSF Sport | ~$55 | 5.3% → 8.1% |
| Momentous Omega-3 | 1,100mg | Triglyceride | NSF Sport | ~$50 | 5.0% → 7.7% |
| Ritual Essential Omega-3 | 1,160mg | Re-est. TG | None (algae) | ~$45 | 5.2% → 7.4% |
| iwi Life Omega-3 | 300mg | Phospholipid | None (algae) | ~$36 | 5.0% → 6.8% |
| Nature Made Fish Oil | 720mg | Ethyl Ester | USP | ~$6 | 5.1% → 6.5% |
Final Verdict
Nordic Naturals Ultimate Omega is the best omega-3 for most adults: high concentration, triglyceride form, IFOS certified, zero aftertaste. Thorne Super EPA is the EPA-forward alternative for inflammation focus. For vegans, Ritual is the standout. Nature Made is fine on a budget, but the ethyl ester limitation is real and measurable.
Frequently Asked Questions
Fish oil vs. algae omega-3: which is better?
For EPA and cardiovascular outcomes, fish oil in triglyceride form leads. For vegans or DHA brain-health focus, algae is the better choice. Ritual is the best algae option we tested.
How long before I see results?
Bloodwork changes are typically measurable at 90 days. Research uses 8-16 week supplementation periods. Do not expect results in 2 weeks.
How do I avoid fishy burps?
Take with a fatty meal, choose triglyceride-form products, store in the freezer after opening. Nordic Naturals had zero fishy burps in 90 days.
Emma R.
Emma is a contributing writer covering nutrition and evidence-based wellness. All supplements purchased at retail. This article contains affiliate links. Not medical advice.
Editor's Pick
Nordic Naturals Ultimate Omega
IFOS 5-star. Triglyceride form. Zero fishy burps.