Research Highlights Dietary Impact on Psoriasis

A recent study from King's College London has revealed that a diet abundant in fruits, vegetables, whole grains, low-fat dairy, and lean meats, while being low in saturated fats and sugars, is correlated with reduced severity of psoriasis. This inflammatory skin condition affects millions globally and is associated with immune system dysfunction.

The study, published in the British Journal of Nutrition, explored the relationship between dietary patterns and psoriasis severity among a sample of 257 adults diagnosed with the condition. Participants completed an online survey assessing their adherence to various diet quality indices, including the Mediterranean Diet Score, the DASH (Dietary Approaches to Stop Hypertension) score, and the Healthy Plant-based Diet Index. The severity of psoriasis was self-reported using validated measures.

Key Findings on Diet and Psoriasis Severity

Results indicated that individuals who demonstrated low adherence to the DASH and Healthy Plant-based Diet indices reported higher severity levels of psoriasis. Further analysis highlighted that increased consumption of red and processed meats was linked to more severe psoriasis symptoms, even when adjusting for body mass index (BMI). Conversely, higher intake of fruits, nuts, and legumes was associated with milder psoriasis, but this was not independent of BMI factors.

The research is part of the Asking People with Psoriasis about Lifestyle and Eating (APPLE) project, which aims to investigate lifestyle factors influencing psoriasis.

Implications for Dietary Interventions

This study underscores the potential benefits of dietary modifications as an adjunct to standard clinical treatments for psoriasis management. Sylvia Zanesco, a doctoral candidate at King's College London who led the research, emphasized the importance of integrating dietary assessments into routine care for patients, given the significant impact psoriasis can have on both physical and mental health.

The DASH diet, originally designed to lower blood pressure, emphasizes the consumption of fruits, vegetables, whole grains, and lean proteins while minimizing salt, sugar, and saturated fats. A high score on the Healthy Plant-based Diet Index reflects a diet rich in healthful plant foods and low in animal products and processed foods.

Future Directions in Psoriasis Research

Professor Wendy Hall, a senior author of the study, highlighted the necessity for further exploration into how diets rich in plant-based foods may alleviate psoriasis symptoms through controlled clinical trials. The findings contribute to a growing body of evidence advocating for dietary modifications as a complementary approach in managing psoriasis, potentially enhancing patients' overall quality of life.

Consultant dermatologist Dr. Thivi Maruthappu, also involved in the study, noted that patients frequently inquire about dietary influences on their skin condition, making this research critical in addressing such concerns.