be described in the following reaction scheme where r and r u2032 are each an organic radical and aoh is a primary antioxidant used in the method of the invention apart from the abovementioned reactions it is also possible for reactions on the double bonds of the alkyl esters of fatty acids which can likewise be initiated by oxygen to occur also the carbon hydrogen bond which is located in the allyl position relative to the double bond can be attacked by oxygen in an additional embodiment the at least one primary antioxidant of formula i has the structure of formula ii wherein each of r 3 r 4 and r 5 may independently be the same or different and are hydrogen or an alkyl group and wherein each r 2 is independently a hydrogen or a methyl group is added according to the method of the invention in a further embodiment the at least one primary antioxidant of formula i has the structure of formula iii wherein each of r 3 is independently a hydrogen or a methyl group according to the method of the invention in yet another embodiment of the invention the at least one primary antioxidant having the structure of formulae i ii or iii comprises two identically substituted phenyl structures in a further embodiment of the method of the invention at least one compound selected from among 2 2.