2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/213423We review recent progress in the determination of the subsaturation density behavior of the nuclear symmetry energy from heavy-ion collisions as well as the theoretical progress in probing the high density behavior of the symmetry energy in heavy-ion reactions induced by high energy radioactive beams. We further discuss the implications of these results for the nuclear effective interactions and the neutron skin thickness of heavy nuclei.12 pages, 5 figures. Talk given at the International workshop on nuclear dynamics in heavy-ion reactions and neutron stars, July, 10-14, Beijing, ChinaNuclear TheoryDetermining the density dependence of the nuclear symmetry energy using heavy-ion reactionstext