•Hypothesis (and possible predictions): Gut microbiota changes along with the body composition in obese individuals during weight loss. The possible prediction is that gut microbiota changes before, during and after losing weight.
•Experiment and variables: Obese individuals were subjected to a dietary regimen during 4 months. The experiment consisted in measuring BIA and gut microbiota before, during and after the intervention. Gut microbiota was analysed through quantitative-real time PCR using the 16S rDNA to identify the bacteria genus present in the gut. The variables are weight loss and gut microbiota, the independent one is weight