Introduction and objective:
Obesity is a serious, complex and multifactorial disease affecting people worldwide. In just a few decades, it has become a huge public health problem for societies in different regions of the world. Bariatric surgery is the most effective method of treatment that allows for long- -term weight reduction and reduces the risk of developing comorbidities with obesity, and reduces the mortality rate. The aim of the study was evaluation of the role of surgical treatment for obesity in weight reduction and its effect on comorbidities.

Review methods:
Online scientific databases containing articles in Polish and English were systematically and comprehensively searched: systematic reviews, randomized control trials, meta-analyses, and clinical trials. The following scientific databases were searched: Pubmed, Web of Science, Google Scholar, Elsevier, and Scopus. The material was collected from April – September 2023. Article search was carried out by entering key words. Scientific articles covering the period from 2018–2023 constitute 54% of the items in the literature. During the search, case reports and published studies that appeared to contain significant methodological errors were excluded.

Brief description of the state of knowledge:
Considering the fact that more than 1,4 billion people worldwide are persons with overweight or obesity, it becomes justifiable to look for such therapeutic methods that are not only effective in reducing excess weight, but also in improving or complete remission of comorbidities

Bariatric surgery is the most effective method of treatment that allows for long-term weight reduction, reducing the risk of developing comorbidities with obesity, and reducing the mortality rate.

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