Omega-3 supplements, such as fish oil, have not been shown reliably to improve psoriasis when used on their own. Some studies suggest they may help when added to standard treatment, but results are mixed and the best dose is unclear. Eating oily fish can be part of a balanced diet, yet supplements should not replace prescribed creams, light therapy, or other psoriasis medicines.
Why are omega-3 supplements being studied for psoriasis?
Psoriasis is a long-term inflammatory condition that can cause raised patches of skin, scaling, redness, and itching. Omega-3 fatty acids are healthy fats that influence inflammatory processes in the body. Researchers have therefore investigated whether getting more of these fats could help reduce psoriasis-related skin inflammation.
There are several types of omega-3 fatty acids. Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) are found mainly in fatty fish and algae. Alpha-linolenic acid (ALA) is found in foods such as flaxseeds, chia seeds, walnuts, and certain vegetable oils. Fish oil supplements generally provide EPA and DHA, while some plant-based supplements provide ALA or algae-derived omega-3s.
The National Psoriasis Foundation explains that research into omega-3 supplements for reducing psoriasis symptoms has produced mixed results. Although their effects on inflammation provide a reason to study them, this does not establish that taking a supplement will improve the skin.
What does the research say about fish oil and psoriasis?
Clinical research has not established omega-3 supplements as a reliable standalone treatment for psoriasis. Studies have differed in their participants, supplement formulations, amounts taken, treatment duration, and the outcomes measured. These differences make it difficult to determine whether a particular product provides a consistent benefit.
Studies of omega-3 supplements used alone
A meta-analysis published in 2019 examined 13 randomized controlled trials involving 625 participants. However, only three trials provided usable data for the pooled analysis. The researchers found no statistically significant reduction in psoriasis severity measured with the Psoriasis Area and Severity Index. The results did not establish that fish oil supplements reliably improve psoriasis when used as the main treatment.
This finding is important because a supplement may affect inflammatory processes without producing a meaningful improvement in visible skin symptoms. The available evidence does not establish that omega-3 capsules can reliably reduce scaling, clear plaques, or prevent future flare-ups. Read the original findings in the National Library of Medicine's record of the fish oil meta-analysis.
Could omega-3 supplements work alongside standard treatment?
Some research has reported more encouraging results when omega-3 supplements are combined with conventional psoriasis treatments. A systematic review of 18 randomized controlled trials involving 927 participants found that omega-3 supplementation alone did not significantly improve several measured skin outcomes. In studies combining supplements with conventional treatment, some outcomes improved.
These findings suggest that omega-3 supplements may have a supporting role in certain treatment plans, but they do not establish a dependable benefit for everyone. The studies varied, and additional well-designed research is needed to determine who might benefit, which formulations may be useful, and how much of a difference they make. The findings are available in this systematic review of fish oil and its components in psoriasis management.
Does taking omega-3 help more than eating foods rich in omega-3?
Not necessarily. Eating foods that contain omega-3 fatty acids is a practical way to include these nutrients in a balanced diet. Fatty fish such as salmon, sardines, trout, and herring provide EPA and DHA. Walnuts, flaxseeds, chia seeds, and some vegetable oils provide ALA.
However, eating more omega-3-rich foods has not been established as a direct treatment for psoriasis, and results from supplement trials cannot automatically be applied to foods. The purpose of a balanced diet is to support general health rather than promise that a particular nutrient will clear skin symptoms.
If you do not eat fish, algae-based products can provide EPA and DHA. A healthcare professional or registered dietitian can help you choose suitable food sources based on your dietary preferences and nutritional needs.
What do dermatology guidelines say about omega-3 supplements?
The American Academy of Dermatology has evaluated fish oil and other dietary supplements as complementary approaches to psoriasis care. Its psoriasis clinical guideline explains that a lack of evidence or conflicting findings prevents it from making a recommendation for these supplements as psoriasis treatments.
This means omega-3 supplements should not be considered an established replacement for treatments that a dermatologist has prescribed. Depending on the person's needs, psoriasis care may involve topical medicines, phototherapy, oral medicines, or biologic treatments. The appropriate approach depends on factors such as the areas affected, the impact on daily life, previous treatment results, and other health conditions.
If psoriasis remains troublesome despite treatment, a discussion with a dermatologist is more useful than relying on supplements alone. A clinician can review the current treatment plan and consider whether any adjustments are appropriate.
Are omega-3 supplements safe for people with psoriasis?
Omega-3 supplements are generally tolerated by many people, but they can cause side effects and may interact with medicines. The amount of EPA and DHA in a product also matters, so taking more is not necessarily better.
The National Institutes of Health Office of Dietary Supplements identifies possible side effects such as an unpleasant taste, bad breath, heartburn, nausea, stomach discomfort, diarrhea, and headache. Omega-3 supplements may also affect blood clotting, particularly at higher doses, and people taking medicines such as warfarin may need additional monitoring.
Before starting a supplement, discuss it with a healthcare professional if you take prescription medicines, use other supplements, have a bleeding disorder, or have a planned procedure. This is also important during pregnancy or breastfeeding, when the suitability of a product and its ingredients should be reviewed individually.
Check the label for the actual EPA and DHA content rather than assuming that the stated amount of fish oil represents the amount of omega-3 fatty acids. Products may differ in composition, and there is no established psoriasis-specific dose that has been shown to work reliably.
How should you decide whether to try omega-3 supplements?
The decision depends on why you are considering a supplement and what you hope it will achieve. If the main goal is to control psoriasis, the current evidence is not strong enough to promise a meaningful improvement. A clinician can help weigh the uncertain potential benefit against the cost, side effects, possible interactions, and any other reason for taking omega-3s.
Before making a decision, consider these practical points:
- Clarify your goal: Discuss whether you want to address a nutritional need or explore a possible additional option for psoriasis management.
- Review your medicines: Tell your healthcare professional about prescription medicines, nonprescription products, and other supplements you use.
- Keep established treatment in place: Do not stop or reduce prescribed psoriasis treatment because you have started taking fish oil.
- Review the results: If a clinician agrees that a trial is reasonable, discuss how to assess whether it is helping and when to reconsider its use.
Supplements are not automatically safer than medicines simply because they are sold without a prescription. Their quality, contents, effects, and potential interactions deserve consideration just like other products used for health.
The bottom line on omega-3 and psoriasis
Omega-3 supplements are biologically interesting because they influence inflammation, but clinical evidence has not shown that they reliably improve psoriasis on their own. Some studies suggest a possible additional benefit when they are combined with standard treatment, although the evidence remains uncertain.
Including omega-3-rich foods in a balanced diet can support general nutrition. If you are considering fish oil or an algae-based supplement specifically for psoriasis, discuss the decision with your healthcare professional and continue your established treatment unless your clinician recommends a change.