Figure 4From: Minimization of free radical damage by metal catalysis of multivitamin/multimineral supplements AAOS blunts formation of DMPO/ ‧ OH. Hydroxyl radical was generated by the Fenton reaction in aqueous solutions (20 mM HEPES pH 7.2) with DMPO (20 mM), H2O2 (60 mM), Fe (0.9 mM), or copper (0.8 mM).Back to article page