As occurred with the DPPH or FIC assays, a concentration dependent reducing power was observed for all the samples assayed. BHT, at all concentrations showed the highest ferric reducing capacity in terms of mM trolox equivalents (mM TE). As occurred with the DPPH assay, the PFSPD and PFSPM samples showed a higher ferric reducing capacity than the PFAD and PFAM samples. In PFSP, no statistical differences were found at a high concentration (100 mg/mL) between the PFSPD and PFSPM samples. As regards PFA, the PFAD samples showed a higher ferric reducing capacity at all concentrations than PFAM samples.