Introduction and objective:
Irritable bowel syndrome (IBS) is a compound, functional disorder of the digestive system. It is characterized by abdominal pain and change of the rhythm of bowel movements. Despite many studies, the pathophisiological cause of IBS has not been found. Nevertheless, it is suspected that inflammatory processes can play a huge part in the develompent of the disease. Currently, there is no effective treatment which could cure IBS. Many methods, including change in diet are recommented to IBS patients to help decrease the symptoms. Polyphenols which can be found, among others, in green tea, turmeric and red wine, show anti-inflammatory and anti-cancer action, prebiotic properties and immunomodulate action. Benefits from their use are seen in many different dieases. The aim of the review was to find articles published in 2004–2022 concerning the influence of a polyphenols rich diet on IBS symptoms.

Review methods:
A systemic review was carried out according to the PRISMA protocol (Preferred Reporting Items for Systemic Reviews and Meta-Anaslysis). Databases such as Pubmed and Scopus were screened systematically. Of the 72 articles fund, 50 articles were left after the removal of duplicates. Finally, 7 studies were included in the review.

Abbreviated description of the state of knowledge:
Currently, there is no single factor which could be defined as the cause of IBS; therefore, IBS is considered a multifactorial disease. Researchers postulate many possible reasons: dysbiosis, gutbrain axis disorders or gastrointestinal barier dysfunction. Possible treatments include low FODMAP diet or the Mediterranean diet. Some studies have shown the benefital influcence of a polyphenols rich diet.

Summary:
On the basis of the screened articles, the conclusion May be drawn that a polyphenols rich diet can be beneficial for IBS patients. However, due to the small amount of data, further studies are needed to clearly recommend a polyphenols rich diet as an additional treatment in IBS.