Abstract
Introduction: Obesity is a multifactorial and polygenic condition that, according to the World Obesity Federation, will affect over 1 billion people by 2030. In this regard, research is being conducted regarding gut microbiota influence on the pathogenesis of this disease, such as inflammation and insulin resistance. Therefore, understanding the gut microbiota and the mechanism by which its modulation through diet and/or the use of probiotics can impact the host and contribute to the treatment of obesity is essential. Methods: A systematic review was conducted on the PubMed, Scielo, and ScienceDirect databases, following the PRISMA protocol, from January 2018 to September 2022. Results and Conclusion: 415 articles were found. 36 studies were evaluated, and 20 were included in this review. The use of calorierestricting diets, along with the consumption of grains and cereals, was found to be useful in reducing strains that promote inflammation and insulin resistance, factors that are associated with obesity pathogenesis, leading to weight reduction. Other studies examined probiotics use, which led to lipopolysaccharides and insulin resistance reduction, as well as a decrease in the quantity of pro-inflammatory cytokines associated with obesity and type 2 diabetes mellitus. Therefore, combining diets with probiotic therapies may be a strategy for microbiota modulation, aiming to reduce inflammatory markers and insulin resistance.