This chapter elucidates the fundamental role of magneto-mechanical stresses as a primary mechanism through which static and low-frequency magnetic fields influence cellular processes. We demonstrate that magnetic forces, particularly when amplified by magnetic nanoparticles (MNPs), exert precise control over cellular mechanics. At the membrane level, these forces induce subtle deformations that directly modulate the gating of mechanosensitive ion channels, such as Piezo1, thereby regulating Ca2+ and K+ fluxes and initiating downstream signaling cascades that govern gene expression, metabolism, and cytoskeletal remodeling. At higher force thresholds, magneto-mechanical stress triggers significant structural alterations, including membrane blebbing due to cortical detachment, which can act as a precursor to apoptosis—an effect with pronounced implications for cancer therapeutics. Furthermore, these magnetic stresses are transmitted through the cytoskeletal network, altering the tension in F-actin, microtubules, and intermediate filaments to remodel cell shape, motility, and adhesion, thereby influencing critical processes like cell migration and differentiation. We demonstrate that the noninvasive and selective nature of this magneto-mechanical approach offers a highly versatile and potent strategy for biomedical applications.