"(Our research) demonstrates that fat accumulates in the liver with age, but the most striking finding is that the type of fat accumulated differs depending on the oils consumed and this means that, regardless of this accumulation, some livers age in a healthier way than others and with a greater or lesser predisposition to certain diseases," Dr. José Luis Quiles Morales, who co-authored the study and works as a professor of physiology at the University of Granada in Spain, told Science Daily.