Inflammatory cytokines increase in patients with type 2 diabetes (T2D) and metabolic syndrome. This review focuses on inflammatory cytokines such as C-reactive protein (CRP), tumor necrosis factor (TNF-α), and adiponectin, a cytokine produced by adipose tissue and associated with insulin sensitivity. Despite the major role of cytokines in the development of T2D, in the case of adiponectin still is a matter of debate as the best strategy to change proper inflammatory response.