11 May 2017 --- A new study shows that the choice of fat causes epigenetic changes which in turn could contribute to differences in fat storage. Previous research had already demonstrated that saturated fat is more fattening and less muscle building than polyunsaturated fats, but Swedish researchers have now studied the epigenetic changes in the study participants’ fat tissue, through biopsies taken before and after the project and found that the epigenetic pattern in more than 3000 genes (out of approximately 25000 that exists in a human being) had changed differentially, depending on whether the participants had eaten saturated fat or polyunsaturated fat.