Foods to Avoid for Psoriasis
Based on the most recent evidence, there is no specific list of foods that must be universally avoided for psoriasis, with the important exception of gluten—which should only be eliminated if you have confirmed celiac disease or positive celiac antibodies. 1
Evidence-Based Dietary Guidance
Gluten Restriction (Only for Specific Patients)
The 2021 AAD-NPF guidelines provide clear direction on gluten 1:
- Screen for celiac disease if you have moderate to severe plaque psoriasis by asking about GI symptoms
- Only follow a gluten-free diet if you have:
- Confirmed celiac disease diagnosis, OR
- Positive celiac antibodies (IgA or IgG antigliadin antibodies)
- If celiac antibodies are positive, try a strict gluten-free diet for 3 months to assess benefit
- Important caveat: Even with positive antibodies, improvement is not guaranteed—some patients benefit, others do not 1
Foods Associated with Worsening (Research Evidence)
While guidelines don't mandate universal food avoidance, research suggests certain foods may trigger flares in susceptible individuals 2, 3:
Foods most commonly associated with worsening:
- Red meat and processed meats
- Alcohol
- Foods high in saturated fats
- Simple sugars and refined carbohydrates
- High sodium intake
- Monosodium glutamate (MSG) in processed foods
- Smoked foods
- Excessive pepper
In one pilot study, 88% of patients who avoided beef, MSG, yerba mate, black coffee, chocolate, smoked foods, pepper, and black tea reported reduced scaling, erythema, and milder outbreaks 2.
The Inflammation Connection
Saturated fatty acids, simple sugars, red meat, and alcohol can exacerbate psoriasis through activation of inflammatory pathways (TNF-α/IL-23/IL-17 axis), while omega-3 fatty acids, vitamin D, dietary fibers, and probiotics may help suppress these pathways 3.
What the Most Recent Data Shows
Critical finding from 2025: Patients with moderate-to-severe psoriasis have less healthy dietary patterns than those with mild disease, including lower fruit/vegetable intake and higher consumption of processed meat, sodium, free sugars, and alcohol 4. However, diet quality alone does not appear to independently cause psoriasis 5.
Practical Clinical Approach
Rather than focusing on foods to avoid, prioritize what to include:
- Mediterranean-style diet - emphasizes whole fruits, vegetables, grains, healthy fats 6
- Omega-3 fatty acids (fish oil) - may augment effects of standard treatments 1
- Weight management - if overweight/obese, as this directly impacts disease severity 4
- Antioxidants - vitamins A, C, E, selenium 7
Common Pitfalls to Avoid
- Don't recommend universal gluten-free diets - these are restrictive, impact quality of life, and only help patients with celiac disease or positive antibodies 1
- Don't ignore individual food sensitivities - if a patient identifies specific trigger foods through their own observation, elimination may be reasonable 8
- Don't overlook comorbidities - patients with psoriasis plus metabolic syndrome, diabetes, or cardiovascular disease need dietary counseling that addresses both conditions 9
Bottom Line
Focus on an anti-inflammatory, Mediterranean-style diet rather than strict food elimination, unless celiac disease is confirmed. The evidence supports improving overall diet quality rather than avoiding specific foods universally 1, 6.