Studies have not yet defined an exact link between diet and psoriasis but the studies conducted to date highlight the following: 
  • A healthy diet can be a preventative measure against heart disease, which is a known complication of psoriasis.  
  • Obesity is a risk factor for psoriasis and eating healthily can keep weight within a normal range. 
  • Psoriasis is an inflammatory disease. Studies suggest that certain nutrients can reduce inflammation associated with psoriasis/psoriatic arthritis. 
  • Studies suggest that certain vitamins can aid psoriasis treatment. 

Useful tips

Try to eat healthy foods
Try to avoid unhealthy food
What
Why
What
Warning
Lean protein (example: skinless chicken)​
A low fat option can help maintain a healthy weight and a healthy heart
High fat protein (example: fatty red meat)
High fat foods can contribute to weight gain. High fat diets are linked to heart disease
Whole grains (example: whole wheat pasta, rice, bread)
Reduce the risk of heart disease and help maintain a healthy weight. Often high in fiber and good for digestion.
Refined carbohydrates (example: white pasta, rice, bread)
A diet high in refined carbohydrates can contribute to weight gain. Minimal nutritional value means they are not conducive to a healthy diet if eaten regularly.
Omega 3 fatty acids (example: fish such as salmon, mackerel, tuna and cod)
Reduce inflammation in the body. Lowers lipids (such as bad cholesterol).
Saturated fats/trans fats (example: butter, fried foods, fatty meats and dairy, cakes, deserts and chocolate)
Can raise the levels of bad fats in the body which increases your risk of heart disease, etc.
Low fat dairy (example: skimmed and semi skimmed milk (no fat or reduced fat), low fat yogurt
Dairy is an important part of a healthy diet. Low fat options help maintain a healthy weight and a healthy heart.
Full fat diary (example: full fat cheese, milk and yogurt)
High fat intake can contribute to weight gain and is a risk factor of heart disease
Fruit and vegetables (example: apples, pears, papaya, strawberries etc. or broccoli, cabbage, carrots, etc.)
Eating at least five portions of fruit and vegetables a day lowers the risk of heart disease significantly
Alcohol         
Linked to flare-ups of psoriasis
Vitamin D (example: eggs, salmon, canned tuna, milk (low fat)
Some studies suggest that foods rich in vitamin D may aid psoriasis treatment.
Refined sugars (example: sweets and full sugar fizzy drinks)
There is little to no nutritional value in refined sugars. Sweets are linked to weight gain.
Vitamin B12 (example: shellfish, fish, low fat dairy)
Some studies suggest that foods rich in vitamin B12 may aid psoriasis treatment.​