The present invention generally relates to the field of oil refinement. In particular, the present invention relates to the field of processes to produce refined oils, substantially free of contaminants, such as glycidyl esters, for example. In accordance with the present invention, such refined plant oils free of glycidyl esters may be obtained by using plant oil or a plant oil fractions having a maximum level of 3 weight-% diacylglycerols (DAG) in the oil refinement process.