Omega-3 fatty acids, especially EPA and DHA from fish, are involved in how the body regulates and resolves inflammation, which is why they are studied for joint comfort and mobility. The results are mixed. Some reviews of trials found small improvements in joint pain and morning stiffness with gram-level daily doses, while a large five-year trial in older adults with knee pain found no change [3][4][7]. Eating fatty fish regularly is the simplest way to get them.
Key Takeaways
- EPA and DHA are the omega-3s studied most for joints. They come mainly from fatty fish; plant ALA converts to them only in small amounts.
- Pooled trials found small reductions in joint pain, stiffness and tender joints after 3 to 4 months, mostly with doses of about 3 g or more a day.
- A large 5-year trial of 840 mg a day found no change in knee pain, function or stiffness in older adults.
- A 3-ounce serving of farmed salmon supplies about 1.8 g of EPA and DHA, more than many supplements.
- FDA considers up to 5 g a day of EPA and DHA from supplements safe. Ask your doctor first if you take a blood thinner.
Evidence grade: Emerging. Dozens of randomized trials exist, but results are mixed: meta-analyses found small benefits for joint pain in some groups, while the largest and longest trial found none.
What Omega-3 Fatty Acids Are
Omega-3s are a family of polyunsaturated fats. The three main ones are alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) [1].
- ALA is found in plant oils such as flaxseed, soybean and canola oil, and in chia seeds and walnuts [1].
- EPA and DHA are found mainly in fish and seafood, and DHA is also available from algal oil [1].
Your body can turn some ALA into EPA and then DHA, but the conversion is very limited, with reported rates under 15% [1]. That is why joint research focuses on EPA and DHA. NIH has set intake targets only for ALA: 1.6 g a day for adult men and 1.1 g for adult women [1]. For a broader look at what omega-3s do in the body, see our guide to the benefits of omega-3 fatty acids.
How Omega-3s Are Involved in Inflammation
Inflammation is a normal process, and joints are one of the places it shows up as stiffness or discomfort. A 2017 review by nutrition researcher Philip Calder explains several ways EPA and DHA take part in it [3]:
- They become part of cell membranes, partly replacing omega-6 fats that are used to make more strongly inflammatory signaling molecules.
- They can partly dampen several steps of the inflammatory response, including the release of some signaling proteins.
- EPA and DHA are made into compounds called resolvins, protectins and maresins, which help the body switch inflammation off once its job is done.
These mechanisms come largely from laboratory and animal research. They explain why scientists test omega-3s for joint comfort, but they do not by themselves show that a supplement will make your joints feel better.
What Joint Studies Have Found
Most omega-3 joint trials were done in people with diagnosed joint conditions, not in healthy adults with occasional stiffness. Here is what the main studies measured.
Reviews of many trials
A 2007 meta-analysis in Pain pooled 17 randomized trials in people with rheumatoid arthritis or joint pain linked to other inflammatory conditions. After 3 to 4 months, omega-3 supplements reduced patient-reported joint pain, minutes of morning stiffness and the number of painful or tender joints. Pain rated by physicians did not change significantly [4].
A larger 2017 review pooled 42 trials of fish and other marine oils. Across 30 trials with pain data, marine oils had a small favorable effect on pain. The effect was clear in trials in rheumatoid arthritis but not in the five trials in osteoarthritis. The authors rated the overall evidence as low quality, and moderate quality for rheumatoid arthritis [5].
The NIH Office of Dietary Supplements sums up the rheumatoid arthritis trials this way: they have not shown consistent effects on painful or tender joints, joint swelling or morning stiffness [1]. Many of these trials used about 3 g or more of EPA and DHA a day, for example 2.0 g EPA plus 1.2 g DHA [1]. NCCIH also notes a 2022 review of 30 studies in which diets rich in omega-3s were linked with less pain and fewer swollen and tender joints in people with rheumatoid arthritis [2].
Knee studies in older adults
The VITAL trial gave more than 25,000 U.S. adults omega-3s or a placebo. In 1,398 participants who already had chronic knee pain, 840 mg a day of EPA and DHA for an average of 5.3 years did not change knee pain, function or stiffness compared with placebo [7].
An Australian trial compared a high dose (4.5 g of omega-3s a day) with a low dose (0.45 g a day) in 202 adults with knee osteoarthritis. Both groups improved over two years, and the low-dose group improved more on pain and function. There was no difference in cartilage loss [6]. The study had no placebo group, so it cannot show how much of the improvement came from the oil itself.
| Study | Who took part | Daily omega-3 dose | Length | What it found |
|---|---|---|---|---|
| Goldberg and Katz, 2007 (17 trials pooled) [4] | Adults with inflammatory joint pain | Varied by trial | 3 to 4 months | Less self-reported pain, morning stiffness and tender joints; no change in physician-rated pain |
| Senftleber et al., 2017 (42 trials pooled) [5] | Adults with various joint conditions | Varied by trial | Varied | Small benefit for pain overall; not seen in the osteoarthritis trials; low-quality evidence overall |
| Hill et al., 2016 [6] | 202 adults with knee osteoarthritis | 4.5 g vs 0.45 g | 2 years | Both groups improved; low dose did better; no difference in cartilage loss |
| VITAL knee pain analysis, 2020 [7] | 1,398 older adults with chronic knee pain | 840 mg EPA + DHA vs placebo | About 5 years | No difference in knee pain, function or stiffness |
What this means for you
If omega-3s help joint comfort at all, the effect seen in trials is modest, it takes months, and it was found mostly at doses of several grams a day. Omega-3s are not a substitute for care from your doctor, and people with a diagnosed joint condition should not change prescribed treatment without talking to their provider [2]. For a closer look at the pain research, read about the role of omega-3s in pain reduction.
Food Sources of Omega-3s
Cold-water fatty fish such as salmon, mackerel, tuna, herring and sardines are the richest sources of EPA and DHA. Lower-fat fish such as cod, tilapia and bass, and most shellfish, contain less [1]. The Dietary Guidelines for Americans recommend that adults eat 8 ounces or more of a variety of seafood each week [2].
| Food | Serving | Omega-3 per serving |
|---|---|---|
| Salmon, Atlantic, farmed, cooked | 3 ounces | 1.24 g DHA + 0.59 g EPA |
| Herring, Atlantic, cooked | 3 ounces | 0.94 g DHA + 0.77 g EPA |
| Sardines, canned in tomato sauce | 3 ounces | 0.74 g DHA + 0.45 g EPA |
| Mackerel, Atlantic, cooked | 3 ounces | 0.59 g DHA + 0.43 g EPA |
| Trout, rainbow, wild, cooked | 3 ounces | 0.44 g DHA + 0.40 g EPA |
| Flaxseed oil | 1 tablespoon | 7.26 g ALA |
| Chia seeds | 1 ounce | 5.06 g ALA |
| English walnuts | 1 ounce | 2.57 g ALA |
Values from the NIH Office of Dietary Supplements [1]. Plant foods are useful for ALA, but remember that only a small share of ALA becomes EPA and DHA [1]. For other foods people include for joint wellness, see our list of foods high in antioxidants for joint protection.
Where OPA Omega 3 Gummies Fit
OPA Omega 3 Gummies are an orange-flavored gummy made with fish oil powder, designed to support daily omega-3 intake and overall wellness. A serving of two gummies lists 100 mg of fish oil powder with 13.2 mg of DHA and 2.8 mg of EPA, and each bottle is a 30-day supply.
To be clear about the numbers: that is about 16 mg of EPA and DHA per serving. The joint trials above used 840 mg to several grams a day, and a single 3-ounce serving of farmed salmon has about 1,800 mg [1][7]. These gummies are a convenient way to add a small amount of omega-3 to your routine. They are not a substitute for fatty fish and do not supply the doses tested in joint research. Each serving also contains 3.2 g of sugar, and the gummies contain tuna fish.
Safety and Interactions
- Common side effects: Omega-3 supplements usually cause only mild effects, such as an unpleasant taste, bad breath, heartburn, nausea, stomach discomfort, diarrhea, headache and odorous sweat [1].
- How much is too much: FDA has concluded that supplements providing no more than 5 g a day of EPA and DHA combined are safe when used as recommended, and the European Food Safety Authority considers long-term intakes up to about 5 g a day safe [1]. Doses of 2 to 15 g a day might lengthen bleeding time [1]. See is 1,000 mg of fish oil too much? for dose comparisons.
- Heart rhythm: In two large trials, 4 g a day for several years slightly raised the risk of atrial fibrillation in people who had or were at high risk of cardiovascular disease [1]. Talk to your doctor before taking high doses.
- Blood thinners: Fish oil might lengthen clotting time (raise INR) when taken with warfarin, although most research at 3 to 6 g a day found no significant effect [1]. If you take warfarin or another blood thinner, talk to your doctor or pharmacist before starting omega-3 supplements.
- Allergies: Fish oil products come from fish. If you have a fish allergy, check labels and ask your doctor.
- Joint symptoms: See a doctor for joint pain that is new, severe, swollen, red or warm, or that lasts more than a few weeks.
Frequently Asked Questions
Can omega-3 fatty acids support joint comfort?
Possibly, but the evidence is mixed. Pooled trials found small reductions in self-reported joint pain and morning stiffness after 3 to 4 months, mostly at several grams a day [4][5]. The largest long-term trial, using 840 mg a day for about five years, found no change in knee pain [7].
How much omega-3 did joint studies use?
Most trials that reported benefits used roughly 3 g or more of EPA and DHA a day, for example 2.0 g EPA plus 1.2 g DHA [1]. There is no official dose for joint comfort, so follow product labels and ask your healthcare provider.
What are the best omega-3 foods for joint health?
Fatty fish such as salmon, herring, sardines, mackerel and trout provide EPA and DHA directly. Flaxseed, chia seeds and walnuts provide ALA, which the body converts to EPA and DHA only in small amounts [1].
Is food or a supplement better for omega-3s?
Food is a strong starting point: one 3-ounce serving of farmed salmon supplies about 1.8 g of EPA and DHA [1]. Supplements can help people who rarely eat fish, but check the label for the EPA and DHA amounts, not just the total fish oil.
Are there side effects of taking omega-3 supplements?
Most are mild, such as a fishy taste, heartburn or loose stools. High doses can lengthen bleeding time, so talk to your doctor before taking omega-3s with a blood thinner [1].
How long does it take omega-3s to affect joint comfort?
In trials that saw an effect, changes appeared after about 3 to 4 months of daily use [4]. Long-term use in the VITAL trial did not change knee pain [7].
Sources
- NIH Office of Dietary Supplements. Omega-3 Fatty Acids: Fact Sheet for Health Professionals.
- National Center for Complementary and Integrative Health. Omega-3 Supplements: What You Need To Know. 2024.
- Calder PC. Omega-3 fatty acids and inflammatory processes: from molecules to man. Biochem Soc Trans. 2017.
- Goldberg RJ, Katz J. A meta-analysis of the analgesic effects of omega-3 polyunsaturated fatty acid supplementation for inflammatory joint pain. Pain. 2007.
- Senftleber NK, Nielsen SM, Andersen JR, et al. Marine oil supplements for arthritis pain: a systematic review and meta-analysis of randomized trials. Nutrients. 2017.
- Hill CL, March LM, Aitken D, et al. Fish oil in knee osteoarthritis: a randomised clinical trial of low dose versus high dose. Ann Rheum Dis. 2016.
- MacFarlane LA, Cook NR, Kim E, et al. The effects of vitamin D and marine omega-3 fatty acid supplementation on chronic knee pain in older US adults: results from a randomized trial. Arthritis Rheumatol. 2020.
Disclosure: OPA Nutrition sells supplements, including products mentioned in this article. This content is for education only and is not medical advice. Statements about dietary supplements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Talk to your healthcare provider before using any supplement, especially if you take medication or have a medical condition.
Written and reviewed by Michael Gonzales, Founder, OPA Nutrition · Last reviewed: · How OPA researches and writes
