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Effets consommation sucre psoriasis.

Does sugar consumption promote the onset of psoriasis?

Psoriasis, a chronic inflammatory skin disease, is characterised by thick red plaques covered with scales that appear on various parts of the body. While diet can play a crucial role in reducing symptoms associated with psoriasis, it's important to note that certain foods tend to trigger it. Could sugar be one of them? This article provides the answer.

Published February 20, 2024, by Manon, Scientific Editor — 3 min read

Does sugar have an effect on psoriasis?

The consumption of certain foods is discouraged, even prohibited in cases of psoriasis. These tend to create a pro-inflammatory state. Sugar is at the forefront of these.

A study conducted on rats affected by an induced form of psoriasis has shown that excessive consumption of simple sugars exacerbates the disease, particularly in terms of inflammation. Rats fed on fructose showed an increase in serum levels of IL-17 compared to control rats. They also exhibited an increase in epidermal thickness and an increase in the expression of neutrophil markers that contribute to inflammation. All these factors led to a worsening of psoriasis.

Regarding the role of sugar in the onset of psoriasis, scientific research has not yet established a direct link between sugar consumption and the triggering of psoriasis. However, sugar intake can potentially influence the severity of symptoms in some individuals with psoriasis by increasing chronic inflammation. Sweets and all sugary products such as cakes or spreads should be consumed in moderation by individuals with psoriasis. Similarly, ice creams and jam are not recommended.


  • AFIFI L. & al. Dietary behaviors in psoriasis: Patient-reported outcomes from a U.S. National Survey. Dermatology and Therapy (2017).

  • KANDA N. & al. Nutrition and psoriasis. International Journal of Molecular Sciences (2020).


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