This paper presents the results of nuclear modification factors for hadrons in deuteron-deuteron collisions at energies of √(s_NN)=13.5 GeV and √(s_NN)=27.0 GeV. We have applied the widely-used nuclear-modified parton distribution functions and parton distribution functions for free nucleons to determine nuclear modification factors (NMFs) of J/ψ, D± and π0 mesons. The obtained results showed the NMFs values of J/ψ and π0 ones to remain close to unity over the entire transverse momentum range from 0.5 to 4.5 GeV/c. The NMFs values of D± ones decreased sharply with increasing the transverse momentum at √(s_NN)=13.5 GeV, but they remained close to unity at √(s_NN)=27.0 GeV.