FGF21 and AIDS: In addition, other related biomarkers linked with immunometabolism were tested: fibroblast growth factor 21 (FGF-21), a cytokine associated with insulin resistance and metabolism in PLWH (27), soluble urokinase plasminogen activator receptor (suPAR), a marker for monocyte, T-cell, and plasminogen activation associated with non-AIDS events in PLWH (28, 29), and GLP-2, a marker of microbial translocation with a role in tissue protection and improvement of metabolic function (30, 31).