Custom «Dieting» Essay Paper Sample



An imperative aspect of nutrition is the daily intake of nutrients. Nutrients consist of a variety of chemical substances in the food that makes up every person's diet. Various nutrients are vital for life, and a sufficient quantity of nutrients in the diet is crucial for providing energy, building and sustaining body organs, and for diverse metabolic processes. Excluding the nutrient from the diet leads to a dietary insufficiency and a decline in various features of health. There exists six main classes of nutrients found in food: carbohydrates, lipids (fats and oils), vitamins (both fat-soluble and water-soluble), proteins, minerals, as well as water. These six nutrients can be classified further into three central efficient groups:

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Carbohydrates are the main basis of energy for the body. They are composed typically of the hydrogen (H), oxygen (O) and elements carbon (C) and come on diverse sizes. The smallest carbohydrates are the simple sugars (monosaccharides) and disaccharides- constituting one or two sugar molecules. The paramount recognized simple sugar is table sugar, also known as sucrose, a disaccharide. Additional simple sugars comprise the monosaccharides glucose and fructose, which exist in fruits, and the disaccharides, which consist of sucrose, lactose found in milk, and maltose found in beer and malt fluids.

The bigger carbohydrates comprise of these smaller simple sugars and are acknowledged as polysaccharides or complex carbohydrates. These are generally made up of numerous allied glucose molecules, although, contrasting simple sugars, they do not contain a sweet flavor. Examples of foods high in complex carbohydrates comprise potatoes, beans, and vegetables. Another type of complex carbohydrate is nutritional fiber. Nevertheless, even though fiber is a complex carbohydrate made up of connected sugar molecules, the body cannot split separately the sugar connections and, unlike other complex carbohydrates, it passes through the body with negligible modifications.

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Even though carbohydrates are not considered as one of the fundamental nutrients, the body depends on them as its chief energy supply. The body consumes nearly all carbohydrates to produce glucose, which serves as the essential useful molecule of energy inside the cells of the human body (glucose is broken down to eventually generate adenosine triphosphate, or ATP, the elementary unit of energy). When the providence of carbohydrates is too little to sufficiently provide all the energy requirements of the body, amino acids from proteins are transformed to glucose.

Proteins and Lipids

Proteins are comprise the elements carbon (C), oxygen (O), hydrogen (H), and nitrogen (N) which contain a diversity of uses in the body, as well as serving as a basis of energy, as substrates (starter materials) for tissue development and maintenance, and for certain biological purposes, for instance creating structural proteins, relocate proteins, enzyme molecules, and hormone receptors. Moreover, proteins are the main constituent in bone, muscle, and additional tissues and body liquids. When used for energy, protein provides an average of 4 kcal/g.

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Proteins from animal supply like meat, milk, poultry and fish are considered to be of high biological significance since they include all of the fundamental amino acids. Proteins from plant supply like wheat, rice, corn and beans are considered to be of little biological importance since an individual plant supply does not enclose all of the necessary amino acids. Consequently, blends of plant supply should be used to give these nutrients.

When protein ingestion is insufficient, but total caloric ingestion is adequate, a situation known as kwashiorkor may perhaps arise. Symptoms of kwashiorkor comprise an inflated stomach, loss of hair and hair shade, and an inflamed liver. Conversely, if protein and caloric ingestion are equally insufficient, a situation known as marasmus arises. Marasmus presents with a stoppage of development, tremendous muscle failure, and weakness.

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Lipids, which comprise of fats and oils, are high-energy yielding molecules composed mostly of carbon (C), hydrogen (H), and oxygen (O) (though lipids have a smaller number of oxygen molecules than carbohydrates have). This little number of oxygen molecules makes lipids unsolvable in water, but soluble in specific organic solvents. Lipids that are derived from animals include an advanced quantity of saturated fats, and they are consequently solid at room temperature. Exclusion to this statute is fish, which, for the most fractions, encloses unsaturated fat.

According to Rotella, the significant distinction involving saturated and unsaturated fatty acids is that saturated fatty acids are the most significant element that can amplify a person's cholesterol intensity. Amplified cholesterol intensity might ultimately upshot in the obstruction of blood arteries and, eventually, heart disease. The crucial amino acids are fatty acids considered necessary to a person's diet since the body cannot generate them. The important fatty acids serve numerous significant roles in the body, as well as modifying blood pressure and assisting to synthesize and renovate fundamental cell parts. Lipids are also necessary for the assimilation of fat-soluble vitamins, and they are usually thought to boost the taste and flavor of foods and to give an individual a sensation of completeness.

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Vitamins, Minerals and Water

Vitamins are another form of chemical compounds required for ordinary development and metabolism. Some vitamins are essential for innumerable metabolic responses that result in the release of energy from carbohydrates, fats, and proteins. There exists thirteen types of vitamins, which might be separated into two factions: the four fat-soluble vitamins (vitamins A, D, E, and K) and the nine water-soluble vitamins (the B vitamins and vitamin C). Insufficiency of vitamins may possibly consequence from insufficient intake, and from aspects unconnected to supply.

Minerals are diverse from the other nutrients in that they are inorganic compounds (carbohydrates, proteins, lipids, and vitamins are all organic compounds). The primary configuration of minerals is typically a molecule, or molecules, of an element. The purposes of minerals do not comprise involvement in the yielding of energy. But they do play fundamental parts in quite a few physiological functions, including significant participation in nervous system performance, in cellular responses, in water equilibrium in the body, and in structural systems, such as the skeletal structure.

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Water has numerous essential purposes in the human body. Some of its procedures include its utilization as a solvent (a substance that other substances liquefy in), as a lubricant, as a transmission system for carrying of essential nutrients and superfluous waste, as well as being a form of temperature parameter.

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