<p>Systemic lupus erythematosus (SLE) is a multifaceted autoimmune disorder characterized by chronic inflammation, tissue damage, accelerated cardiovascular disease and the synthesis of autoantibodies that target nucleic acids and nuclear protein complexes. Emerging evidence underscores the key role of immune metabolic dysregulation in SLE, revealing how metabolic reprogramming during immune cell activation influences disease development and progression. Alterations in key metabolic pathways such as glycolysis and oxidative phosphorylation profoundly affect the activation, differentiation and function of B and T cells, monocytes, neutrophils and other immune cells, driving inflammation and tissue injury. This Review synthesizes current findings on immune cell metabolism in animal models of lupus and in patients with SLE, highlighting the interplay of metabolic disturbances, mitochondrial dysfunction and disease pathogenesis. Furthermore, it explores the potential of targeting metabolic pathways as therapeutic strategies to mitigate organ damage and improve outcomes in SLE.</p>