The gut microbiome plays a crucial role in regulating metabolism and influences body weight and obesity through several mechanisms. It affects how we absorb nutrients, regulate energy balance, and can impact fat storage. An imbalance in gut bacteria may lead to inflammation, insulin resistance, and altered metabolism, contributing to weight gain. Furthermore, specific microbial populations are linked to appetite regulation and may influence how much food we eat. Understanding this connection can inform dietary strategies aimed at combating obesity and promoting overall health.