Ultra-Processed Foods and Sibling Diseases: Psoriasis, Eczema, Rheumatism and Gut Health
February 17, 2026 · Dr. Mehmet İlteber Bahadır

The share of ultra-processed foods in our diets is steadily increasing; these foods set the stage not only for weight gain but also for chronic inflammation and immune system problems. Chronic inflammatory diseases such as psoriasis, eczema and rheumatism are negatively affected by this way of eating and appear as interconnected “sibling diseases.”
The harms of ultra-processed foods
They contain high amounts of sugar, salt, saturated fat and additives. They negatively affect the gut microbiota, weaken the barrier and increase inflammation. The deterioration of gut health can disrupt immune balance and trigger skin and joint diseases.
Psoriasis, eczema and rheumatism — sibling diseases
They develop on a shared inflammatory basis. A person who has one has a relatively high risk of encountering the others over time — this reflects the imbalance in the immune system and the different appearances of chronic inflammation in different organs.
The importance of gut health
The gut houses a large part of the immune system. A healthy microbiota helps keep inflammation under control and supports skin and joint health.
Conclusion
In treating these diseases, it is necessary to address not only the symptoms but also eating habits and gut health. Staying away from ultra-processed foods and eating a balanced diet is a supportive step.
This article is for general information purposes; for dietary changes, it is recommended that you consult your physician.

Dr. Mehmet İlteber Bahadır
With 29+ years of experience, he applies natural, cortisone-free treatment approaches for psoriasis, eczema and rheumatic conditions.
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