Medically reviewed by Debra Sullivan, Ph.D., MSN, R.N., CNE, COI
Written by Megan Ware, RDN, L.D.
June 18, 2019

Weight-loss diet

Obesity is a comorbidity of psoriatic disease, which means it is more likely to occur in a person with psoriasis or PsA than in those without psoriatic disease.

Obesity and excess weight can put additional strain on joints. It also involves inflammation and may make psoriasis worse.

Maintaining a healthy weight can help a person avoid obesity and other comorbidities of psoriatic disease, such as high blood pressure, high lipid levels, and heart disease.

Following a calorie-controlled diet may help. However, a non-restrictive diet that focuses mainly on fresh fruit, vegetables, and whole grains may also help a person manage their weight.

Mediterranean diet

The Mediterranean diet encourages a high consumption of fruits, vegetables, and fish.

An article published in 2018 notes that people with rheumatoid arthritis who followed a Mediterranean diet saw improvements in disease activity and physical function.

One reason for this may be that the diet contains foods that are high in antioxidants, which could also benefit people with PsA.

Not all studies have confirmed a benefit for people with arthritis, but any diet that contains plenty of fresh, plant-based ingredients is likely to have overall health benefits.

DASH diet

The DASH diet emphasizes fresh, plant-based ingredients and whole foods.
The DASH diet can help keep blood pressure, cholesterol levels, and other measures of health within the recommended range.

The DASH diet does not restrict the intake of food but focuses on fresh, plant-based produce, and whole grains rather than processed foods and red meats.

A diet with overall health benefits may help a person with PsA to manage their symptoms and prevent complications and comorbidities.

Summary
Experts do not recommend a specific diet for PsA, but a person may benefit from a diet that:

  • boosts overall health
  • reduces inflammation
  • increases fiber intake
  • is heart-healthy
  • enables a person to manage their weight
  • is low in unhealthful fats and added salt and sugar
  • contributes to healthful gut bacteria

A diet that emphasizes plant-based foods while limiting the intake of processed foods is likely to be beneficial.