Adjusting the immune system’s activity—not just suppressing it, but tuning it up or down depending on what’s needed.Immunomodulation encompasses interventions that modify immune function without complete suppression—including upregulation of deficient responses, downregulation of overactive responses, and redirection of immune polarization. Key immunomodulatory peptides on Peptidings include thymosin alpha-1 (T cell maturation, dendritic cell activation), cortistatin (anti-inflammatory via M2 macrophage polarization), VIP (VPAC-mediated immune suppression), and alpha-MSH/MC1R agonists (anti-inflammatory melanocortin signaling). Immunomodulation is distinct from immunosuppression.