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Nutrition is the relationship of foods to the health of the human body.
Proper nutrition means that you are receiving enough foods and supplements for
the body to function at optimal capacity. It is important to remember that no
single nutrient or activity can maintain optimal health and well being, althoughCustom Essays on Vitamins and your Health
it has been proven that some nutrients are more important than others. All of
the nutrients are necessary in different amounts along with exercise to maintain
proper health.
There are six main types of nutrients used to maintain body health.
They are carbohydrates, fats, proteins, vitamins, minerals, and water. They
all must be in balance for the body to function properly. There are also five
major food groups. The groups are fats and oils, fruits and vegetables, dairy
products, grains, and meats.
Exercise is also an important part of nutrition. Exercise helps tone
and maintain muscle tissue and ensure that the bodys organs stay in good
condition. Healthy eating without exercise will not result in good nutrition
and a healthy body - neither will exercise without nutrition. The most
important thing about exercise is that it be practiced regularly and that it be
practiced in accompaniment with a healthy diet. It is also desirable to
practice more that one sport as different sports exercise different areas of the
body.
Carbohydrates, proteins, and fats are the sources of energy for the body.
The contained energy is expressed in calories. There arecalories per gram in
fat and there are about 4 calories per gram in proteins and carbohydrates.
Carbohydrates are the main source of energy for the body. This energy is mostly
used for muscle movement and digestion of food. Some sources of carbohydrates
aregrains, fruits, vegetables, and anything else that grows out of the ground.
The energy in carbohydrates is almost instantly digested. This results in a
quick rise in blood sugar, which is soon followed by a drop in blood sugar that
is interpreted by the body as a craving for more sugars. This sugar low may
also result in fatigue, dizziness, nervousness, and headache. However, not all
carbohydrates do this. Most fruits, vegetables, legumes, and whole grains are
digested more slowly. Fats, which are lipids, are the source of energy that is
the most concentrated. Fats produce more that twice the amount of energy that
is in carbohydrates or proteins. Besides having a high concentration of energy,
fat acts as a carrier for the fat-soluble vitamins, A, D, E, and K. Also, by
helping in the absorption of vitamin D, fats help make calcium available to
various body tissues, in particular, the bones and teeth. Another function of
fat is to convert carotene to vitamin A. Fat also helps keep organs in place by
surrounding them in a layer of fat. Fat also surrounds the body in a layer that
preserves body temperature and keeps us warm. One other function of fat is to
slow the production of hydrochloric acid thereby slowing down digestion and
making food last longer. Some sources of fats are meats and nuts as well as
just plain oils and fats.
Proteins, besides water, are the most plentiful substance in the body. Protein is also one of the most important elements for the health of the body. Protein is the major source of building material in the body and is important in the development and growth of all body tissues.Protein is also needed for the formation of all hormones. It also helps
regulate the bodys water balance. When proteins are digested they are broken
down into simpler sections called amino acids. However, not all proteins will
contain all the necessary amino acids. Most meat and dairy products contain all
necessary amino acids in their proteins. Proteins are available from both
plants and animals. However, Animal proteins are more complete and thus
desirable. Knowledge of the nutrients and their function is essential to
understanding the importance of good nutrition.
As mentioned above, there are six nutrients. All vitamins are organic food substances that are found only in living things, plants and animals. It is believed that there are about twenty substances that are active as vitamins in human nutrition. Every vitamin is essential to the proper growth and development of the body. With a few exceptions, the body cannot make vitamins and must be supplied with them.Vitamins contain no energy but are important as enzymes, which help speed up nearly all metabolic functions. Also, vitamins are not building components of body tissues, but aid in the construction of these tissues. It is impossible to reliably determine the vitamin requirements of an individual because of differences in age, sex, body size, genetic makeup, and activity.
A good sourceof a recommendation is the RDA. The RDA makes its recommendations based on
studies of consumption of the given nutrient. On the recommendation it will
usually specify what size diet the recommendation is based on, for example, a
two thousand calorie per day diet. It is harmless to ingest excess of most
vitamins. However, some vitamins are toxic in large amounts. Vitamin A is a fat
soluble vitamin which is only available in two forms. Pre-formed, which is
found in animal tissue. The other is carotene, which can be converted into
Vitamin A by animals . Carotene is found in easily found in carrots as well as
other vegetables . Vitamin A is important to the growth and repair of body
tissues and helps maintain a smooth, soft, and disease free skin. It also helps
protect the mucus membranes of the mouth, nose, throat, and lungs which reduces
the chance of infection. Another function is helping mucus membranes combat the
effects of air pollutants. Vitamin A also protects the soft lining of all the
digestive tract. Another function of vitamin A is to aid in the secretion of
gastric juices. The B complex vitamins have many known sub-types, but they all
are water soluble vitamins. The B vitamins can be cultivated from a variety of
bacteria, yeast, fungi, or molds . They are active in the body by helping the
body convert carbohydrates into glucose, a form of sugar. B vitamins are also
vital in the metabolism of proteins and fats. They are also the single most
important element in the health of the nerves. B vitamins are also essential
for the maintenance of the gastrointestinal tract, the health of the skin, hair,
eyes, mouth, liver, and muscle tone. The intestine contain a bacteria that
produces vitamin b but milk-free diets, and taking sulfonamides or antibiotics
can destroy these bacteria . Whole grains contain high concentrations of B
complex vitamins. Also, enriched bread and cereal products contain high
concentrations of B vitamins due to a governmental intervention of the whole
food group to ensure that the nation was getting enough B vitamins Vitamin C,
also known as ascorbic acid, is a water soluble vitamin. It is sensitive to
oxygen and is the least stable of all vitamins . One primary function of
vitamin C is to maintain collagen, a protein necessary for the formation of skin,
ligaments, and bones. Vitamin C also plays a role in healing of burns and
wounds because it aids the formation of scar tissue. It also helps form red
blood cells and prevent hemorrhaging. Another function is to prevent the
disease, scurvy, which used to be seen in sailors because of their lack of
vitamin C in their diet. This was corrected by issuing each sailor one lime per
day which supplied citric acid, a source of vitamin C. Other sources include
broccoli, Brussels sprouts, Strawberries, Oranges, and grapefruits . Vitamin E
is a fat soluble vitamin which is made up of a group of compounds called
tocoherols. There are seven forms of it but the form known as Alpha tocoherol
is the most potent . Tocoherols occur in the highest concentrations in cold
pressed vegetable oils, all whole raw seeds and nuts, and soybeans. Vitamin E
plays an essential role in cellular respiration of all muscles, especially the
cardiac and skeletal. It makes these muscles able to function with less oxygen,
thereby increasing efficiency and stamina. It also is an antioxidant, which
prevents oxidization. This prevents saturated fatty compounds from breaking
down and combining to form toxic compounds. Minerals are nutrients that exist
in the body and in organic and inorganic combinations . There are approximately
seventeen minerals that are necessary in human nutrition . Although only about
four or five percent of the body weight is mineral matter, minerals are
important to overall mental and physical health. All of the bodys tissues and
fluids contain some amount of mineral. Minerals are necessary for proper muscle
function and many other biological reactions in the body. Minerals are also
important in the production of hormones. Another important function of minerals
is to maintain the delicate water balance of the body and to regulate the
bloods pH. Physical and emotional stress causes a strain on the bodys supply
of minerals. A mineral deficiency often results in illness, which may be
treated by the addition of the missing mineral to the diet. Calcium, a primary
mineral, is available through dairy products. In order to get all the other
minerals, one should eat protein rich foods, seeds, grains, nuts, greens, and
limited amounts of salt or salty foods. Nutrition is just one aspect of total
body health. It is important to remember that on must compliment good nutrition
with good exercise and emotional health in order to achieve complete well being.
It is also important to remember that no one part of nutrition will completely
fulfill the bodys requirements for health.
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