What is a characteristic of unsaturated fats?
The unsaturated fats could be defined as those fats which have the characteristic of remaining liquid at room temperature (MedicineNet, https://www.medicinenet.com/script/main/art.asp?articlekey=18389 ).
From a chemical standpoint, the unsaturated fats can be monounsaturated (there is one double bond in the fatty acid chain), or polyunsaturated (there is more than one double bond).
When a diet is high in monounsaturated fats (like the oleic acid), the danger of insulin resistance is lower.
Insulin resistance is a medical condition in which cells fail to respond to the hormone insulin.
When a diet is high in polyunsaturated fats (especially large amounts of arachidonic acid), as well as saturated fats (like the arachidic acid), the danger of insulin resistance is higher.