In summary, this review suggests that dietary intervention may reduce the severity of psoriasis, probably improves quality of life and likely reduces BMI. Diet combined with exercise also may reduces psoriasis severity.
The authors note, however, that no trials assessed the time to relapse. Furthermore the trials reviewed were limited in that they included unblinded participants and had a high dropout rate. They suggest that to improve future studies, efforts should be made to reduce dropout rates, include comprehensive outcome measures and evaluate time to relapse.
Given the association with cardiovascular morbidity and psoriasis it is important to reduce the usual cardiovascular risk factors. Therefore exercise and diet should be included in the counselling in patients with psoriasis. Future studies must measure the impact of these interventions so that dermatologists may better understand the influence of diet and exercise on psoriasis severity.