Fuente: WIPO "essential oil or extracts" Disclosed is a novel method for preserving cosmetic/personal care formulations through a two component preservative system, said system comprising (a) Component I which functions to eliminate the existing microbial contamination load in a natural cosmetic formulation base through an optimized pasteurization method that avoids deep freezing; and (b) Component II that includes the step of adding synergistic blends of fractionated essential oils, extracts and isolated compounds to the pre-pasteurized cosmetic base obtained through the method of component I, wherein the synergistic blends sustain the effects of pasteurization through anti-microbial and anti-oxidant effects, said anti-oxidant effects enhancing further the anti-microbial effects by virtue of inhibiting lipid per oxidation that facilitates the undue proliferation of microbe.