Changes provoked by nixtamalization and tortilla making in the lipids of two corn varieties. A study by 1H NMR

•The effect of nixtamalization and tortillas-making on corn lipids is studied.•Both the elimination of fatty acids and the reduction of minor components occur.•A small oxidation and a slight diminution in the unsaturation degree are produced.•No important changes in the distribution of acyl groups are observed.•1H NMR has enabled the quantitative study of all these issues.