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Author: admin, 08.12.2015
Essential nutrients are nutrients required for normal body functioning that either cannot be synthesized by the body at all, or cannot be synthesized in amounts adequate for good health (e.g. Some categories of these include vitamins, dietary minerals, essential fatty acids, and essential amino acids.  For example, most mammals synthesize their own ascorbic acid, and it is therefore not considered an essential nutrient for such species.
Many essential nutrients are toxic in large doses (see hypervitaminosis or the nutrient pages themselves below). Amazingly, given enough calories, the human body is capable of manufacturing the majority of the thousands of the chemical nutrients that it needs to sustain life. Fats provide energy for the body and are among the main components of healthy cells; they contain more than twice the number of calories (nine Calories per gram) than proteins or carbohydrates. Minerals are inorganic (not made by living things) substances that are essential nutrients for the proper functioning of the body.
Although not absolutely essential, fiber in the diet plays a crucial role in the proper functioning of the gastrointestinal system. It is, however, an essential nutrient for human beings, who require external sources of ascorbic acid (known as Vitamin C in the context of nutrition). Amazingly, provided with enough calories, the body is capable of manufacturing nearly all of its needed essential nutrients.
About 98% of the dietary fats are composed of triglycerides that are, in turn, made up of fatty acids.
Iron is the most important of all the trace elements because it is essential nutrients in the structure of hemoglobin, the red blood cell molecule that carries oxygen to the tissues.
Essential nutrients are also defined by the collective physiological evidence for their importance in the diet, as represented in e.g. The essential nutrients are divided into six general categories: water, proteins, carbohydrates, fats, vitamins, and minerals.

There are, however, some 45 or so essential nutrients that the human body is incapable of manufacturing.
Water also functions as the environment in which water-soluble foodstuff is absorbed in the intestines and the waste products are eliminated in urine.
With the rare exception of vitamin D, the human body is incapable of making vitamins, and they are thus essential. Electrolytes must be consumed in relatively large quantities, but trace elements are needed in very small amounts.
Adequate intake of fiber is also essential for  the normal functioning of the bowels and prevention of disease. These nutritional elements are called essential nutrients because it is essential  for humans to incorporate them into their diets.
Electrolytes are the more important of the minerals and include sodium, potassium, chloride, calcium, magnesium, and phosphorous. This article reviews the essential nutrients, their sources, and their role in health and disease.
The essential nutrients can be divided into six general categories: water, proteins, carbohydrates, fats, vitamins, and minerals.
Carbohydrates are widely available in normal diets, even in the poorest countries, but the preferred sources of carbohydrates are cereals (wheat, rye, corn, etc.), fruits, and vegetables, which also contain adequate fiber and other essential nutrients. The deficiencies of most of the other minerals have never been demonstrated in humans, but animal studies have shown that these deficiencies are possible. Strictly speaking, fiber is not an essential nutrients, but it is also extremely important in prevention of certain diseases. Similar to electrolytes, trace elements are present in more than adequate amounts in a balance diet.

These amino acids are lysine, leucine, isoleucine, methionine, phenylalanine, threonine, tryptophan, and valine.
There are no specified daily requirements for carbohydrates, but about 100 grams of carbohydrates should be enough to prevent breakdown of the body stores of proteins and fats (for calorie needs). As a rule of thumb, animal products have an abundance of the saturated fats, and vegetable oils are richer in the healthier mono- and polyunsaturates.
Vitamins are required in very small amounts and can be obtained from a variety of food sources. In addition, two amino acids, histidine and cysteine, are essential nutrients to the newborn infants, and histidine may even be essential nutrients for adults. Any source of protein (meat, fish, poultry, cereals or legumes) is sufficient in providing the body with the required amino acids, although animal proteins are richer in essential amino acids than cereal or vegetable sources. The recommended daily requirements of calcium are approximately 800 milligrams in children and 1000-1200 milligrams in adults.
Protein toxicity (too much protein) results in accumulation of waste products (nitrogen) that are harmful to the kidneys.
However, it is important to consume fatty foods and oils that are high in unsaturated- and low in saturated fatty acids in order to protect the cardiovascular system from the ravages of the bad (LDL) cholesterol.
The recommended daily protein requirements are about 20-35 grams for children and 45-55 grams for adults.
Most electrolytes are widely abundant in nature and more than adequately present in a balanced diet.

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