Omega-3 and Joint Pain (2026): What the Research Says, Products Compared
In trials, fish oil helped joint pain only a little. People with rheumatoid arthritis needed fewer pain pills and reported a little less pain; results for stiffness and swollen joints were mixed. For knee osteoarthritis, a high dose did no better than a low one. Fish oil is not a treatment for joint pain, so talk to your doctor. If you take fish oil for general health, our pick is Viva Naturals Triple Strength, at $0.30 per 1,000 mg of EPA and DHA.
By Erin Rose Updated October 17, 2026 How we score
If you take fish oil: our 3 picks
 Viva Naturals Triple Strength |  Puori O3 |  Momentous Omega-3 |
|---|---|---|
| Best for | ||
| Most people | If fish burps bother you | Drug-tested athletes |
| EPA+DHA a softgel | ||
| 1,035 mg | 583 mg | 800 mg |
| Cost per 1,000 mg | ||
| $0.30 | $0.81 | $0.83 |
| Testing list | ||
| IFOS | IFOS | NSF Certified for Sport |
| Check price | Check price | Check price |
Our pick: A tested fish oil for most people
Viva Naturals Triple Strength
10.0/10 Our score
10.0/10 on our score, the same pick as our best fish oil
- EPA+DHA
- 1,035 mg a softgel2,070 mg in 2 softgels
- Per 1,000 mg
- $0.30Amazon price
- Testing list
- IFOSLot reports online, checked October 17, 2026See the listing
- Form
- Triglyceride (rTG)
Why we pick it It costs the least per 1,000 mg of the fish oils on a testing list, and IFOS posts a lab report for each lot it tests. It is our pick in the best fish oil.
What you give up Fish oil is not a treatment for joint pain, and the joint trials found small, mixed effects (below).
What changed in the joint trials
- Pain pills neededRheumatoid arthritis (Lee 2012; Goldberg 2007)Fewer
- Pain, as patients rated itRheumatoid arthritis and other joint pain (Goldberg 2007)A little less
- Morning stiffnessRheumatoid arthritis (Goldberg: shorter; Lee: no clear change)Mixed
- Tender or swollen jointsRheumatoid arthritis (Goldberg: fewer painful or tender; Lee: no clear change)Mixed
- Pain, as doctors rated itRheumatoid arthritis and other joint pain (Goldberg 2007)No clear change
- Knee painKnee osteoarthritis (Senftleber 2017; Hill 2016)Not shown
From four reviews and two long trials; each is in the study list below. These are study results, not treatment advice.
Rheumatoid arthritis trials: fewer pain pills, mixed results on swelling
In rheumatoid arthritis, the clearest thing fish oil did was cut how many anti-inflammatory pain pills people needed. One review pooled 10 trials where people with rheumatoid arthritis took at least 2.7 g of EPA and DHA a day for 3 months or more. Swollen joints, tender joints, morning stiffness and daily function were not clearly different from placebo in that review; an earlier review of 17 trials did find shorter morning stiffness and fewer tender joints. NIH’s fact sheet reads these trials as mainly fewer pain pills.
One trial gave people with new rheumatoid arthritis three standard drugs plus fish oil. A high dose (5.5 g a day) made it less likely that the drug treatment failed, compared with a low dose (0.4 g). The fish oil was taken with the drugs, under doctors’ care, not in place of them. Ask your rheumatologist before you start.
Knee arthritis trials: a high dose did no better
For knee osteoarthritis, fish oil is not a proven treatment, and a big dose was not better than a small one. The best long trial gave 202 people a fish oil liquid every day for 2 years, at a high dose (4.5 g of omega-3) or a low dose (0.45 g, mostly a plant oil). At 2 years, the low dose had improved pain and function more. Cartilage loss was the same. A review of 5 osteoarthritis trials found no clear drop in pain.
What health groups say, and where the trials land
Health pages describe fish oil a bit more firmly than the pooled trials do. WebMD says fish oil “has been shown to reduce joint pain, as well as the stiffness you might feel when you wake up,” which matches one review of 17 trials. Arthritis UK says trials “significantly reduced” the number of “tender or swollen joints.” On joint counts the reviews disagree: one found fewer painful or tender joints and another found no clear change. The result they agree on is fewer pain pills. Arthritis UK also says fish oil “has less consistent benefit in osteoarthritis,” which matches what we found. WebMD says to pick a fish oil whose maker “certifies its product is free of heavy metals”; the fish oils on a testing list below are ones you can check yourself. We read both pages on October 17, 2026.
| Study | What it found |
|---|---|
| Lee 2012 (review)10 trials, 183 people with rheumatoid arthritis against 187 controls; at least 2.7 g a day for 3 months or more | Only one thing changed clearly: people used fewer anti-inflammatory pain pills. Tender joints, swollen joints, morning stiffness and daily function did not differ significantly. |
| Goldberg 2007 (review)17 trials in rheumatoid arthritis and other joint pain; 3 to 4 months | Patients reported a little less pain and shorter morning stiffness, and used fewer pain pills. Doctors’ own ratings of pain did not change significantly. |
| Senftleber 2017 (review)42 trials | A small drop in pain in rheumatoid arthritis (22 trials). In osteoarthritis (5 trials) the drop was not significant. |
| Gioxari 2018 (review)20 trials, 717 people with rheumatoid arthritis on omega-3; 3 months or more | Several disease-activity scores improved. The authors rated the trials low quality overall. |
| Proudman 2015People with new rheumatoid arthritis on three standard drugs | 5.5 g a day, against 0.4 g, made it less likely that the drug treatment failed (hazard ratio 0.28). Taken with the drugs, not instead of them. |
| Hill 2016202 people with knee osteoarthritis; 2 years | The low dose (0.45 g) improved pain and function more than the high dose (4.5 g). Cartilage loss did not differ. |
Every fish oil we compared
All 10, best score first. Costs are for 1,000 mg of EPA and DHA at Amazon prices. Scores and why each is or is not a pick: the best fish oil.
| Fish oil | EPA+DHA a softgel | Per 1,000 mg |
|---|---|---|
| Viva Naturals Triple Strength10.0/10 · IFOS | 1,035 mg | $0.30 |
| Sports Research Triple Strength10.0/10 · IFOS | 950 mg | $0.34 |
| Nature Made Fish Oil 1200 mg9.0/10 · USP Verified | 300 mg | $0.42 |
| Carlson Elite Omega-3 Gems9.0/10 · IFOS | 700 mg | $0.47 |
| Thorne Super EPA8.0/10 · NSF/ANSI 173 | 695 mg | $0.66 |
| Puori O38.0/10 · IFOS | 583 mg | $0.81 |
| Momentous Omega-38.0/10 · NSF Certified for Sport | 800 mg | $0.83 |
| Barlean’s Ideal Omega 38.0/10 · IFOS | 1,000 mg | $0.97 |
| Nordic Naturals Algae Omega8.0/10 · No testing list | 293 mg | $1.15 |
| NOW Ultra Omega-37.5/10 · No testing list | 750 mg | $0.21 |
Side effects
US and European regulators found no safety concern for adults at up to 5 g of EPA and DHA a day from supplements. In heart trials, fish oil raised the chance of atrial fibrillation, an irregular heartbeat, by about a quarter, and more above 1 g a day (Gencer 2021). The usual side effects are a fishy taste, burps and loose stools. If you take a blood thinner or have a heart rhythm problem, ask your doctor first.
Questions people ask
Does omega-3 help joint pain?
A little, in rheumatoid arthritis. In pooled trials, people needed fewer anti-inflammatory pain pills and reported a little less pain; one review found shorter morning stiffness and fewer tender joints, another found no clear change. For knee osteoarthritis, trials did not show a clear benefit. Talk to your doctor about joint pain.
Can fish oil replace my medicine?
No. Never stop a prescribed medicine to take fish oil. In the rheumatoid arthritis trial on this page, people took fish oil with their standard drugs, not instead of them. Ask your doctor before you add it, especially if you take a blood thinner.
Sources
- Lee YH, Bae SC, Song GG. “Omega-3 polyunsaturated fatty acids and the treatment of rheumatoid arthritis: a meta-analysis.” Arch Med Res. 2012. PubMed 22835600
- Goldberg RJ, Katz J. “A meta-analysis of the analgesic effects of omega-3 polyunsaturated fatty acid supplementation for inflammatory joint pain.” Pain. 2007. PubMed 17335973
- Senftleber NK, et al. “Marine Oil Supplements for Arthritis Pain: A Systematic Review and Meta-Analysis of Randomized Trials.” Nutrients. 2017. PubMed 28067815
- Gioxari A, et al. “Intake of ω-3 polyunsaturated fatty acids in patients with rheumatoid arthritis: A systematic review and meta-analysis.” Nutrition. 2018. PubMed 28965775
- Proudman SM, et al. “Fish oil in recent onset rheumatoid arthritis: a randomised, double-blind controlled trial within algorithm-based drug use.” Ann Rheum Dis. 2015. PubMed 24081439
- Hill CL, et al. “Fish oil in knee osteoarthritis: a randomised clinical trial of low dose versus high dose.” Ann Rheum Dis. 2016. PubMed 26353789
- Gencer B, et al. “Effect of Long-Term Marine ω-3 Fatty Acids Supplementation on the Risk of Atrial Fibrillation in Randomized Controlled Trials of Cardiovascular Outcomes.” Circulation. 2021. PubMed 34612056. Safety limits: US FDA letter, June 2019 (Docket FDA-2014-Q-1146); EFSA Journal 2012;10(7):2815.
- NIH Office of Dietary Supplements. Omega-3 Fatty Acids: Fact Sheet for Health Professionals.
- WebMD, “Fish Oil for Rheumatoid Arthritis,” and Arthritis UK, “Fish oils,” both read October 17, 2026.