Idézet:Dietary fats occur naturally in food. They belong to a bigger class of compounds incorporating sterols (for example, cholesterol), waxes, and fat-soluble vitamins. Nevertheless, this distinction isn't generally clear, and occasionally the term fats also incorporates different lipids, like cholesterol. This volume describes the origins of dietary fat compounds from animals and plants. In plants, they exist in seeds (for example, cottonseed, sunflower, nut, rapeseed, soybean, and com), nuts (for example, almonds and pecans) and fruit products (for example, olive, avocado, and palm fruit). Typical animal fat sources include meat, oily fish (for example, salmon, mackerel), milk, and eggs. Both vegetable and animal fats can be eaten as they naturally occur, yet also indirectly, for instance in breads and sauces, where they are added to develop taste and texture. Milk produces different popular animal fats, like cheddar, cream, and butter. Aside from milk, animal fat is obtained principally from rendered tissue fats derived from animals.

The book presents dietary fats, along with sugars and proteins, as the key source of energy in diets, and they have various other significant biological roles. Apart from being structural elements of cells and body membranes (for example, the brain comprises predominantly of fats), they are transporters of fat-soluble dietary vitamins. Fat metabolites are fundamental in processes like brain development and inflammatory responses. When preserved, body fat delivers energy when the body needs it, it pads and protects key organs, and assists with insulating the body. The lipid cholesterol, present in cheddar, eggs, shellfish, and meat, is fundamental for the fluidity and porousness of body cell membranes. It is additionally the antecedent of vitamin D, bile salts, and a few chemicals, which improve fat absorption in the digestive system. Fats can make food more appealing by improving its texture and feel, its look, and containing fat-soluble flavors. Fats additionally have physical qualities that are significant in food manufacturing and preparation. This book discusses food-technology processes and issues related to food reformulation. For instance, the substitution of TFA as a process to decrease the intake of unsaturated fats. Fat suitability for food production is based on its physical properties, like thermal stability and the melting temperature. Fats comprise a mix of unique fatty acids, yet one type largely predominates, which defines the physical qualities. Fats containing a high ratio of SFA, like margarine or lard, have a solid structure at room temperature and have a generally high liquefying temperature. Most vegetable oils, containing significant amounts of MUFA or PUFA, are normally liquid at room temperature.

Idézet:? Various Types Of Fats Their Uses And Risks.pdf (10.19 MB)