2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/175513The nonperturbative renormalization group flow of Quantum Einstein Gravity (QEG) is reviewed. It is argued that at large distances there could be strong renormalization effects, including a scale dependence of Newton's constant, which mimic the presence of dark matter at galactic and cosmological scales.LaTeX, 18 pages, 4 figures. Invited contribution to the Int. J. Mod. Phys. D special issue on dark matter and dark energyHigh Energy Physics - TheoryAstrophysicsGeneral Relativity and Quantum Cosmologytext