Metabolic adaptations of the tumor macroenvironment and their role in cancer progression and survivorship.

Cancer progression is shaped not only by tumor-intrinsic programs and the local microenvironment but also by profound metabolic rewiring of the host at the organismal scale. Tumors engage in dynamic cross-talk with distant organs, immune and neuroendocrine networks, and systemic nutrient pools, generating a metabolically permissive macroenvironment that fuels tumor growth, supports metastatic dissemination, and undermines therapeutic efficacy. In this review, we synthesize emerging evidence showing how cancer-driven systemic metabolic remodeling reshapes glucose, lipid, and protein metabolism, perturbs immune and hematopoietic homeostasis, and hijacks neuroendocrine circuits governing energy balance and stress responses. We further highlight how these adaptations fuel cellular energetics within tumor cells as well as promote premetastatic niche formation, immune evasion, and therapy resistance, while leaving durable metabolic and inflammatory scars that accelerate biological aging and compromise long-term health in cancer survivors. Together, these findings position tumor-host metabolic cross-talk as a central, targetable axis in cancer biology with broad implications for therapy and survivorship care.