Omega-3 Fish Oil
What’s New This Month
- Warning letter: In January 2026 FDA warned Supersmart USA that its Super DHA fish oil product was marketed with disease claims. 1
- Adverse-event reports: FDA’s database holds 73 self-reported reports naming a fish oil product between October 2024 and July 2026. These are unverified and do not show the product caused the event. 2
- Heart rhythm: The 2026 review of 35 trials still links more atrial fibrillation (an irregular heartbeat) to doses above 1,500 mg a day in people at high heart risk. An omega-3 trade group helped pay for it. 3
- Corrections: A heart-failure review we earlier said did not exist does exist: only high-dose DHA-rich oil improved heart pumping in it. The Health Canada fish oil page is now dated 25 September 2026. 4 5
Overview
Fish oil supplies two omega-3 fats, EPA and DHA, taken from oily fish. It is one of the most studied supplements in the world.
It is sold as softgels and liquids. A “1,000 mg fish oil” softgel often has only about 300 mg of EPA plus DHA, so check the combined figure.
The largest review, from 2020, pooled 86 trials in 162,796 people and found little or no effect on heart events. 6
Labels claim it supports the heart, brain, joints, eyes, mood, immunity, liver and skin.
How We Researched It
We rate each marketing claim with a modified version of GRADE, the system medical researchers use to say how sure we can be (i.e., high, moderate, low or very low), and check each trial with the Cochrane risk-of-bias tool, which asks whether a study’s design could skew its results. For fish oil we used about 35 evidence records, mostly from October 2022 to October 2026, plus older landmark trials. We also checked FDA, Health Canada, NIH, EFSA, Prop 65, Japan, Korea, Cochrane and ConsumerLab.
Research NotesTop three benefits
Blood Pressure GRADE: Low
A review of 71 trials found 2 to 3 g a day lowered top blood pressure by about 2.6 points. 7
Bias check: The review is from 2022, before our main window, and the drop is small.
Mood GRADE: Very Low
A review of 10 trials in 1,426 people found EPA-rich oil eased depression scores a little. 8
Bias check: Trial results disagreed sharply, and negative trials may be missing.
Joints GRADE: Very Low
A 262-person trial of 2 g a day of krill oil for 24 weeks found no less knee pain than placebo. 9
Bias check: Krill oil is not fish oil. Health Canada allows a rheumatoid arthritis pain claim at 2,800 to 5,000 mg a day, which is a label rule, not a trial result. 5
Benefit Evaluation
| Claim | Claim Verdict | Research Confidence | Supporting Evidence | Safety Risk | Product Quality | FactStack™ Rating |
|---|---|---|---|---|---|---|
| Blood Pressure | TBD | Low | TBD | Exercise Caution | Variable | Caution |
| Mood | TBD | Very Low | TBD | Exercise Caution | Variable | Caution |
| Joints | TBD | Very Low | TBD | Exercise Caution | Variable | Caution |
| Dry Eye | TBD | Low | TBD | Exercise Caution | Variable | Caution |
| Immune Support | TBD | Very Low | TBD | Exercise Caution | Variable | Caution |
| Liver | TBD | Very Low | TBD | Exercise Caution | Variable | Caution |
| Skin and Well-Being | TBD | Very Low | TBD | Exercise Caution | Variable | Caution |
| Disease Treatment | TBD | Low | TBD | Exercise Caution | Variable | Caution |
| Inflammation | TBD | Very Low | TBD | Exercise Caution | Variable | Caution |
| Asthma and Allergy | TBD | Very Low | TBD | Exercise Caution | Variable | Caution |
| Bone Health | TBD | Very Low | TBD | Exercise Caution | Variable | Caution |
| Heart Health | Doubtful | Low | Doubtful | Exercise Caution | Variable | Warning |
| Cognition | Doubtful | Low | Doubtful | Exercise Caution | Variable | Warning |
| Pregnancy and Child Development | Doubtful | Low | Doubtful | Exercise Caution | Variable | Warning |
What Sellers Say vs. What Studies Show
| “Protects your heart.” | The largest review found little or no effect on heart events. FDA calls the evidence for its heart claims inconsistent and inconclusive. 6 10 |
| “Boosts memory and brain health.” | A 2-year trial of 2 g of DHA a day in 365 older adults found no gain in memory or brain size. 11 |
| “More is better.” | High-risk people taking over 1,500 mg a day had more atrial fibrillation. At 4 g a day, stomach upset rose from 15% to 25%. 3 12 |
| “Flavored means fresh.” | Flavor can hide rancid oil. In one test, 68% of flavored oils were over the rancidity limit, against 13% of plain oils. 13 |
| “Helps dry eyes.” | A 2026 review of 27 trials said omega-3 failed to show consistent benefit for dry eye. Korea recognised a dry-eye function in 2015, but that is a label rule, not a trial. 14 15 |
| “Clinically proven.” | It is well studied, but only triglyceride lowering has moderate evidence, and that is a lab number. |
Trial ParametersIf you try it
| Who | No marketed health benefit is established. Prescription omega-3 is the route for high triglycerides. |
| Dose | 250 to 500 mg of EPA and DHA a day for general use, up to about 1 g. 16 |
| Ceiling | Under 2 g a day (ConsumerLab); FDA and EFSA cite 5 g. Above 1.5 g, ask first if heart risk is high. 16 17 |
| Duration | No clinical stop rule established. Discard if rancid. |
| Form | EPA and DHA stated per serving, with a certificate of analysis or USP or NSF listing; keep cool. |
| Ask First | Heart disease or atrial fibrillation; anticoagulants (blood thinners); surgery; fish allergy. |
How to Take It
| Pick a plan | For general use, 250 to 500 mg of EPA plus DHA a day. Read the EPA plus DHA figure, not the oil weight. |
| Time of day | Not reported. |
| With food | Take it with a meal that has some fat. Fat helps your body absorb it. |
| What to expect | Triglycerides may fall at 2 g a day or more. Fishy taste, heartburn, nausea or loose stools can occur. 17 |
| How to take | Keep it cool and stop if it smells rancid. Health Canada says to refrigerate liquid oil after opening. 5 |
Works With / Don’t Mix With
✓ Works with
A meal with fat. Fat in the meal helps absorption.
Oily fish. Consumer Reports advises eating fatty fish before turning to pills.
Not reported. We found no supplement shown to add to fish oil’s effect.
⚠ Ask first / don’t mix
Blood thinners and surgery. NIH says 2 to 15 g a day may lengthen bleeding time. Warfarin users should have regular clotting (INR) checks. Ask before surgery. 17
Heart disease or atrial fibrillation. Ask your doctor before taking over 1,500 mg a day; high-risk people had more atrial fibrillation. 3
Fish allergy. Allergists advise asking your allergist first. Refining should remove fish protein, but that is not certain. 18
Manufacturer Recalls & WarningsLast 36 months, newest first
| Date | Maker / Brand | Product | Action | Src |
|---|---|---|---|---|
| Jul 2026 | Wiley Companies; Pattern Inc.; Amazon | Fish oil supplements | California Prop 65 notice alleging lead. A notice is an allegation, not a test result. | 19 |
| Jun 2026 | Provision Health Corp. (PH Labs) | Ocular Plus with Lutein, Zeaxanthin and Omega 3-6-9 | FDA Class II recall: an undeclared yellow dye (Yellow No. 5); 6,967 units; still open. | 20 |
| Apr 2026 | The Harvard Drug Group | Prescription omega-3-acid ethyl esters capsules, 1 g | FDA Class II drug recall: failed a loss-on-drying test; 2,238 cartons; still open. A prescription product. | 21 |
| Jan 2026 | Supersmart USA | Super DHA fish oil | FDA warning letter: the product was marketed with disease claims. | 1 |
| Jan 2026 | Prodrome Sciences USA | ProdromeNeuro Oil (omega-3 plasmalogens) | FDA warning letter in a clinical-trial case; no closeout found. | 22 |
| Aug 2025 | Hi-Tech Pharmaceuticals | Fish Oil Heart and Brain Health EPA/DHA Omega 3, 90 softgels | FDA Class III recall: unapproved drug claims; 85,950 units; closed 19 February 2026. | 23 |
| Oct 2024 | AK Forte Ortiga y Omega 3 (C & A Naturistics) | AK Forte Ortiga y Omega 3 tablets | FDA Class II drug recall: undeclared diclofenac and acetaminophen (pain drugs); still open. | 24 |
Where to Buy
We compare products side-by-side not just on price, but on whether NSF lists the product as NSF/ANSI 173 Contents Certified (an independent lab confirms the label matches the contents), whether it is NSF Certified for Sport, whether USP lists it as USP Verified, and whether the seller says it is manufactured in the USA. We leave out a brand’s products for this supplement when, in the last 36 months, the FDA took action against that brand over this supplement (a Class I or II recall, a warning letter, an import alert or an advisory letter). We also leave out any brand with an FDA Class II recall or warning letter on any product. We also leave out any product named in a California Prop 65 notice or a non-US recall, along with that brand’s products of the same ingredient and form. Brands with other actions stay listed and are marked in the Recall Screen column. Our goal remains to provide you, the Consumer, with the information and data necessary to make an informed purchasing decision. Prices reflected below are static and subject to change.
Ratings above describe the ingredient’s research, not any product listed below.
| # | Retailer | Product | Price | NSF 173 | NSF Sport | USP | Mfg. in USA (per seller) | Recall Screen | Affiliate link |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Amazon | THORNE Super EPA, 90 Gelcaps | Check Price | ✓ | ✓ | ✓ | ✓* | View on Amazon ↗ | |
| 2 | iHerb | Designs For Health, Design For Sport®, Omega 3 Hi-Po, 60 Softgels | $50.39 | ✓ | ✓ | ✓ | ✓* | View on iHerb ↗ | |
| 3 | iHerb | Thorne, Advanced DHA, 60 Gelcaps | $30.00 | ✓ | ✓ | ✓* | View on iHerb ↗ | ||
| 4 | Amazon | Theralogix TherOmega Omega-3 Fish Oil, 90 Softgels | Check Price | ✓ | ✓ | ✓ | View on Amazon ↗ | ||
| 5 | HerbsPro | Now Foods, Omega-3 Fish Oil, 1000 Mg, 100 Softgels | $8.12 | ✓ | ✓* | View on HerbsPro ↗ | |||
| 6 | iHerb | Nature's Bounty, Fish Oil, 1,000 mg, 145 Rapid Release Softgels | $12.10 | ✓ | ✓ | View on iHerb ↗ | |||
| 7 | HerbsPro | 21st Century, Fish Oil, 1000 Mg, 120 Softgels | $12.10 | ✓ | ✓ | View on HerbsPro ↗ | |||
| 8 | HerbsPro | 21st Century, Fish Oil, 1200 mg, 140 Softgels | $13.21 | ✓ | ✓ | View on HerbsPro ↗ |
Sources
1. Warning letter to Supersmart USA, LLC, MARCS-CMS 706566. US Food and Drug Administration, 21 Jan 2026. www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/warning-letters
2. CAERS adverse-event reports naming a fish oil product, 7 Oct 2024 to data cut 7 Jul 2026 (openFDA food event records). US Food and Drug Administration (openFDA), 7 Jul 2026. api.fda.gov/food/event.json
3. Abuknesha et al. Omega-3 dose, cardiovascular risk and atrial fibrillation: meta-analysis of 35 randomized trials (funding and disclosures read at the journal). Circulation: Arrhythmia and Electrophysiology, 2026. doi.org/10.1161/CIRCEP.125.014785
4. Tseng PT et al. Omega-3 and heart failure: network meta-analysis of 14 randomized trials (9,075 people). Advances in Nutrition 16(2):100366, 2025. pubmed.ncbi.nlm.nih.gov/39805484/
5. Fish Oil: natural health product monograph (page dated 25 Sep 2026). Health Canada, 25 Sep 2026. webprod.hc-sc.gc.ca/nhpid-bdipsn/atReq?atid=fish.oil.huile.poisson
6. Abdelhamid AS et al. Omega-3 fatty acids for the primary and secondary prevention of cardiovascular disease: Cochrane review. Cochrane Database of Systematic Reviews, 2020. doi.org/10.1002/14651858.CD003177.pub5
7. Zhang et al. Omega-3 dose and blood pressure: dose-response meta-analysis of 71 randomized trials. Journal of the American Heart Association, 2022. doi.org/10.1161/JAHA.121.025071
8. Kelaiditis et al. Omega-3 supplements and depression: meta-analysis of 10 randomized trials. Prostaglandins, Leukotrienes and Essential Fatty Acids, 2023. doi.org/10.1016/j.plefa.2023.102572
9. Laslett LL et al. Krill oil 2 g a day and knee osteoarthritis pain: randomized trial. JAMA, 2024. doi.org/10.1001/jama.2024.6063
10. Qualified health claims for EPA and DHA omega-3 (Docket FDA-2014-Q-1146). US Food and Drug Administration, 19 Jun 2019. www.fda.gov/
11. Yassine et al. DHA 2 g a day for 24 months in older adults at risk of dementia: randomized trial (365 people). eBioMedicine, 2026. doi.org/10.1016/j.ebiom.2026.106316
12. Nicholls SJ et al. STRENGTH: omega-3 carboxylic acids 4 g a day and cardiovascular events: randomized trial. JAMA, 2020. doi.org/10.1001/jama.2020.22258
13. Hands et al. Oxidation (rancidity) of 72 marine and algal omega-3 supplements. Journal of Dietary Supplements, 2023. doi.org/10.1080/19390211.2023.2252064
14. Chen et al. Omega-3 and dry eye: synthesis of 27 randomized trials. Europe PMC record, 2026. europepmc.org/
15. Korea MFDS record: EPA- and DHA-containing oil recognised for dry-eye function (read in translation). Ministry of Food and Drug Safety, Korea, 2015. www.mfds.go.kr/
16. Scientific Opinion on the Tolerable Upper Intake Level of EPA, DHA and DPA. European Food Safety Authority (EFSA Journal), 27 Jul 2012. doi.org/10.2903/j.efsa.2012.2815
17. Omega-3 Fatty Acids: Health Professional Fact Sheet. NIH Office of Dietary Supplements, 20 Sep 2026. ods.od.nih.gov/factsheets/Omega3FattyAcids-HealthProfessional/
18. Fish Allergy. American College of Allergy, Asthma and Immunology, 13 Apr 2022. acaai.org/allergies/allergic-conditions/food/fish/
19. Proposition 65 60-day notice 2026-03653, fish oil supplements (Wiley Companies, Pattern Inc., Amazon; lead). California Office of the Attorney General, 30 Jul 2026. oag.ca.gov/prop65/60-Day-Notice-2026-03653
20. Recall H-1134-2026, PH Labs Ocular Plus with Lutein, Zeaxanthin and Omega 3-6-9 (Class II; ongoing). US Food and Drug Administration (openFDA food enforcement), 18 Jun 2026. api.fda.gov/food/enforcement.json?search=recall_number.exact:%22H-1134-2026%22
21. Recall D-0493-2026, Harvard Drug Group Omega-3-Acid Ethyl Esters Capsules USP 1 g (Class II; ongoing). US Food and Drug Administration (openFDA drug enforcement), 9 Apr 2026. api.fda.gov/drug/enforcement.json?search=recall_number.exact:%22D-0493-2026%22
22. Warning letter to Prodrome Sciences USA, LLC, MARCS-CMS 717959. US Food and Drug Administration, 8 Jan 2026. www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/warning-letters/prodrome-sciences-usa-llc-717959-01082026
23. Recall H-0589-2025, Hi-Tech Pharmaceuticals Fish Oil Heart and Brain Health (Class III; terminated 19 Feb 2026). US Food and Drug Administration (openFDA food enforcement), 6 Aug 2025. api.fda.gov/food/enforcement.json?search=recall_number.exact:%22H-0589-2025%22
24. Recall D-0024-2025, AK Forte Ortiga y Omega 3 tablets (Class II; ongoing). US Food and Drug Administration (openFDA drug enforcement), 8 Oct 2024. api.fda.gov/drug/enforcement.json?search=recall_number.exact:%22D-0024-2025%22
25. Proposition 65 60-day notices 2025-00156 and 2025-00242 (Akraborg, Lysi; cadmium; product listed as “Cod Liver”). California Office of the Attorney General, 2025. oag.ca.gov/prop65
