A few parameters, such as the neutrophil-to-lymphocyte ratio; the level of cholesterol 25-hydroxylase, which is part of the macrophage-enriched metabolic network in adipose tissue; or levels of glutamine, an immune–metabolic regulator in white adipose tissue, are markers that link obesity to inflammation. This evidence concerns the gene CH25H and obesity due to melanocortin 4 receptor deficiency.