It has been alleged that the many studies of saturated fat in the diet did not distinguish between saturated fat and trans fat. Some claim that saturated fat (in the absence of trans fat) is healthful; example foods include peanuts and peanut butter that has no added partially hydrogenated vegetable oil.
Saturated fatty acids have no double bonds between the carbonatoms of the fatty acid chain (hence, they are fully saturated with hydrogenatoms).
Fat that occurs naturally in living matter such as animals and plants is used as food for human consumption and contains a varying proportion of saturated and unsaturatedfat.
Studies suggesting replacing saturatedfats with unsaturatedfats to increase the ratio of HDL to LDL serum cholesterol, have to be analysed within the concept of processed/damaged/oxidised/Trans-shaped versus naturally found/undamaged saturatedfats, since saturatedfat is extremely stable and easily withstands cooking/roasting heats, they resist oxidation and can be stored the longest.
Fats form the structures in our bodies, including muscles, nerves, membranes and blood vessels and are essential for the absorption of fat-soluble vitamins A, D, E and K in the body.
Fats in the diet may be of animal (saturated) or vegetable (unsaturated) origin.
Fats found in foods are a mixture of saturated and unsaturated fatty acids.