[Childhood obesity: current situation in Mexico].

Mexico has reported in 2016 a combined prevalence of obesity and overweight of 33.2% in children. The objective of this work was to make a literature review of the factors associated with obesity in Mexican children, such as genetic factors, feeding patterns, sedentary lifestyle and gut microbiota. We found that in Mexican children SNP (single nucleotide polymorphism) is present in genes such as MC4R, FTO and ADRB1, associated with obesity, and that PON-1192 polymorphism increases the risk of suffering insulin resistance. On the other hand, the variant of the ADIPOR2 gene (rs11061971) protects Mexican children against obesity, as well as a greater number of copies of the AMY gene was found in children with normal weight. The evidence of the number of copies is very important, since the current diet of the Mexican population is rich in carbohydrates and fats, origin of a nutritional transition that includes sedentary activities and a high consumption of sugary drinks. The consumption of certain foods causes important changes in the gut microbiota that contribute to the development of obesity and insulin resistance. It has been found that Mexican children with obesity have a higher abundance of phylum Firmicutes and B. eggerhii bacteria. Therefore, as obesity is so diverse, it is essential to diversify the treatment in which government authorities, parents and health authorities should get involved, as well as reinforcing nutrition and healthy eating issues in primary education in the country in order to reverse the prevalence and prevent the development of other pathologies in Mexican children.