Psoriasis is a chronic autoimmune condition that causes the skin to produce new cells too rapidly, leading to the scaling, inflammation, and plaques that characterise the condition. It affects around 2% of the UK population and, while it has no dietary cure, growing evidence supports the role of diet in managing symptoms and reducing flare frequency and severity.
The connection between diet and psoriasis operates primarily through inflammation: psoriasis is fundamentally an inflammatory condition, and dietary factors that modulate systemic inflammation predictably affect psoriasis severity. This is not a niche or speculative connection — it is supported by multiple clinical studies and is increasingly recognised in mainstream dermatology.
The Anti-Inflammatory Diet and Psoriasis
The dietary pattern with the strongest evidence for psoriasis benefit is the Mediterranean diet: rich in vegetables, legumes, wholegrains, oily fish, and olive oil, with limited red meat, processed food, and sugar. Multiple studies have found that adherence to a Mediterranean dietary pattern is associated with reduced psoriasis severity, lower relapse rates, and better quality of life in psoriasis patients.
The mechanism is primarily anti-inflammatory: the Mediterranean diet reduces levels of inflammatory cytokines that drive psoriasis activity. It also supports a healthier gut microbiome, and gut dysbiosis has been specifically linked to psoriasis severity.
Foods to Include
Oily fish (salmon, mackerel, sardines, herring) provides EPA and DHA omega-3 fatty acids with direct anti-inflammatory effects. Some studies have shown modest but meaningful reductions in psoriasis severity with fish oil supplementation; dietary oily fish achieves similar benefit with the additional advantages of whole food.
Colourful vegetables and fruit provide antioxidants and polyphenols that reduce oxidative stress — elevated in psoriasis — and support immune regulation. Aim for as wide a variety as possible.
Legumes and wholegrains provide fibre that feeds beneficial gut bacteria, contributing to the reduced systemic inflammation that supports skin health.
Turmeric — containing the active compound curcumin — has direct anti-inflammatory and antioxidant properties and has shown promise in psoriasis research. It is also a key flavour element in Filipino and many Asian cuisines, including elements of Vanda's Kitchen's menu at Selfridges Food Hall in EC4. Halal-certified and completely nut-free, the kitchen's food naturally incorporates many of these anti-inflammatory principles.
Foods to Limit or Avoid
Alcohol is one of the most well-evidenced psoriasis triggers. It promotes inflammation, disrupts the gut microbiome, impairs the metabolism of methotrexate (a common psoriasis treatment), and is independently associated with more severe psoriasis in epidemiological studies. Reducing or eliminating alcohol is one of the highest-impact dietary changes for people with psoriasis.
Ultra-processed food is pro-inflammatory and consistently associated with worse psoriasis outcomes. Its high sugar, refined oil, and additive content drives the inflammatory pathways that fuel psoriasis activity.
Red and processed meat in large quantities is associated with higher inflammatory markers. Modest amounts of lean red meat are generally fine, but processed meats (bacon, sausages, deli meat) are worth limiting.
Nightshades (tomatoes, peppers, aubergine, potatoes) are frequently reported as personal triggers by psoriasis patients, though the evidence base is anecdotal rather than clinical. If you suspect nightshades are a trigger, a careful elimination period (four to six weeks) can provide personal data.
Gluten and Psoriasis
Some psoriasis patients have elevated anti-gliadin antibodies, suggesting a sensitivity to gluten that may contribute to psoriasis activity through gut inflammation. If you have been tested for coeliac disease and the result was negative but you suspect gluten sensitivity, discussing this with your GP or dermatologist and considering a supervised elimination trial is reasonable.
Vanda's Kitchen prepares fresh, independently halal-certified and nut-free food across London. Browse our catering shop or WhatsApp the kitchen.
Weight and Psoriasis
Obesity is strongly associated with more severe psoriasis and poorer treatment response. Adipose tissue is metabolically active and produces pro-inflammatory cytokines that drive psoriasis activity. Weight loss in overweight psoriasis patients consistently improves symptom severity, and this is one area where diet and lifestyle changes produce genuinely significant dermatological outcomes alongside broader health benefits.
Practical Meal Planning for Psoriasis
Translating the evidence into daily eating does not require dramatic change. A breakfast of porridge with berries and flaxseed provides fibre, antioxidants, and omega-3 ALA. A lunch of grilled fish with a large mixed salad dressed in olive oil covers omega-3s, antioxidants, and polyphenols. An evening meal of legume-based stew with wholegrains and vegetables rounds out the fibre diversity and micronutrient targets. Vanda's Kitchen at Selfridges Food Hall in EC4, near St Paul's Cathedral, provides halal-certified, completely nut-free food built around fresh vegetables and lean proteins — a practical option for City workers managing psoriasis through their lunch choices.
Psoriatic Arthritis and Diet
Around 30% of people with psoriasis develop psoriatic arthritis — an inflammatory joint condition that shares many of the same dietary risk factors and anti-inflammatory dietary solutions. Weight management, omega-3 intake, and an anti-inflammatory dietary pattern benefit both the skin and joint aspects of psoriatic disease, making dietary investment doubly worthwhile for those affected by both conditions.
Diet cannot cure psoriasis, but an anti-inflammatory dietary approach — consistently maintained — is a meaningful adjunct to medical treatment that many patients find produces noticeable improvements in symptom severity and frequency over time.
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Related: Acne and Diet: Which Foods Help and Which Make It Worse · Skin-Clearing Diet Guide: What to Eat (and Avoid) for Clearer Skin