Abstract
Both pathologies—obesity and depression—have high prevalence rates and have serious negative effects on the public's health. In recent meta-analyses, clinical trials, and epidemiological studies, they have been observed in people of all races. Both obesity and major depression are risk factors related to one another. In this paper, we suggest an overview of the two interconnected biological processes, including genetic influences and changes to the systems in charge of energy synthesis and consumption (hypothalamic-pituitary-adrenal axis, and inflammation, neuroendocrine regulators, and gut microbiota). Additionally, we look into how people perceive their bodies and social stigma, as well as the potential benefits of physical activity and weight-loss surgery on comorbid conditions and quality of life.