Depot fat is not identical with food fat. With the customary diet, the depot fat of each species is a characteristic one. But if diet be altered in either quality or quantity specially after starving the animal, the depot fats may resemble food fat to a varying extent. On the whole, depot fats are more unsaturated than food fats. One [...]
The below mentioned article provides a paragraph on sterols. Sterols or steroids are not true fats. Steroids are derivatives of phenanthrene and have the parent nucleus (perhydrocyclopentanophenanthrene) with 17 carbon atoms consisting in 3 hexagon and one pentagon rings. When the natural steroids have a methyl group at C-13 and generally at C-10 and possess one or more alcoholic groups, [...]
Although the knowledge of lipid metabolism which includes the metabolism of fats, phospholipids, sterol and glycolipids is incomplete but fat possesses its particular importance as well as higher calorigenic status that other foodstuffs, i.e., protein and carbohydrate. Some of their characteristic importance is given below: i. Much of the carbohydrate of the diet is converted to fat prior to its [...]