Some facts about fats

Saturated fats:
Saturated fatty acids or saturated fats have all the hydrogen the carbon atoms can hold. These are usually solid at room temperature, and they’re more stable; they don’t combine readily with oxygen. However, they are the main dietary factors, along with transfats in raising blood cholesterol.
Sources: Home-made ghee, table butter, white butter, coconut oil, cheddar cheese and meat.

Unsaturated fats:
Polyunsaturated and monounsaturated fatty acids are found in liquid oils of vegetable origin. Polyunsaturated oils are liquid at room temperature and in the refrigerator. They help your body get rid of newly formed cholesterol, thus keeping blood cholesterol level down and reducing cholesterol deposits on artery walls.
Sources: Safflower, sesame, soy, corn and sunflower seed and nuts such as pista, almonds, cashew nuts, walnuts.