Kamis, 06 Agustus 2009

[] Iodine Benefits, Dosage, Deficiency, Sources

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Iodine was discovered in burnt sea weed in 1811 by B. Courtois, and isolated in
1819 by Fyfe. It was fond in 1896 by E. Baumann that the thyroid gland was very
rich in Iodine when compared with the other tissues. Iodine was one of the first
minerals recognized as vital for good health. Iodine is am important trace
element for healthy thyroid gland, which kills harmful germs, makes up it own
hormone (thyroxin) and rebuilds energy. It is required for the synthesis of the
thyroxin hormones-thyroxin and triodothyronine. It is present in the secretions
of thyroid gland. Iodine is grayish black in colour, and gives corrosive fumes
of a rich violet colour on heating. Recommended Daily Allowance: The RDA IS 80
mcg for children and 150 mcg for adults. The requirement for growing children,
pregnant and lactating women is more. Excess of Iodine will cause nasal
moisture. Dietary Sources: Iodine is available in traces in water, food,
common salts. It is very rarely found in high mountains and altitudes. Iodine
found in sea-water is 0.2 mg per litre. Sea weeds and spongy shells are very
rich in Iodine. The best sources are sea fish, ser salt, green vegetables and
leaves like spinach grown on iodine rich soil. The common sources are milk,
meat, and cereals. About 90% of the Iodine intake is obtained from the food
consumed, and the remainder from the water. Common salt fortified with small
quantities of sodium or potassium iodate is now compulsorily made available in
the market as Iodised Salt to check goitre. Iodised poppyseed oil is also used
where salt iodisation is not possible. Rice sources of Iodine in mcg per 100
gm of edible portion of food: Egg-9, Spinach-20, Sea foods-30 to 300, Iodised
salt-7600. Certain vegetables like cabbage, cauliflower and radish contain
glucosinolates (thiogluosides) which are potential goitrogens. Eating too much
of these foods inhibit the availability of Iodine to the body from the food and
thus lead to development of goitre. Consumption of water containing chlorine
will also have Iodine lost of the body. Functions in the Body: Dietary organic
Iodine taken by mouth is readily absorbed from the gastro-intestinal tract into
the blood. The iodine metabolism is controlled by thyroid. Iodine is an
essential life. The total quantity in body is 25 mg, and half of it is in the
thyroid as thyroglobulin, a complex of protein and iodine. About 30% is removed
by the thyroid gland for the synthesis of the thyroid hormone, thyroxin, and the
rest is excreted by the kidneys. Its concentration in thyroid gland is very high
as compared to that in muscles and blood. Iodine is present in blood as
inorganic iodine in the plasma and corpuscles and varies from 0.5-1.0 mcg per
100 ml. And also as bound iodine-Thyroxine and tri-iodothyronine in the plasma
in combination with alpha-globulin. It is called protein-bound iodine and is 5-8
mcg per 100 ml. Thyroxin, the thyroid hormone, controls the basic metabolism
and oxygen consumption of tissues. It controls the utilization of sugars. It
regulates the rate of energy production, and promotes proper growth. Iodine
reduces tension, keeps body and mind calm, and keeps skin, hair, teeth, nail etc
in healthy condition and form. Iodine helps in the chemical synthesis of
cholesterol, thus checking its build up in arteries. Extra fat in the body is
also burnt by Iodine. It increases the heart rate as well as urinary calcium
excretion. More on Iodine Benefits, Dosage, Deficiency, Sources Deficiency
Indicators: When the amount of the thyroid hormone in the serum is decreased,
the pituitary gland releases a thyroid-stimulating-hormone (TSH) which causes
the thyroid gland to produce more cells and to increase in size in an attempt to
manufacture more hormones. This leads to enlargement of thyroid gland known as
simple goitre, and swelling of feet or toes, enlarged glands, excessive hunger,
neuralgic pains in the heart etc. Other may show signs of slowed reflexes,
deafness, and poor learning. Iodine deficiency or total loss will affect our
mental and physical activity, obesity, and hardening of blood vessels. A dietary
lack of iodine may cause anemia, tireness, laziness, loss of interest in sex, a
slow pulse, low blood pressure, and high blood cholesterol/triglyceride leading
to heart disease. Among children where diet lacks in iodine, cretin-a dwarfed
child with mental retardation, enlarged thyroid gland, defective speech, and
clumsy gait is created. His skin is rough, and hair sparse, with brittle nails,
bad teeth, and anaemic. Read more on Minerals Benefits, Deficiency, Sources
Find complete and updated information on bare mineral, mineral, vitamin and
mineral, mineral oil, everyday mineral. Read http://www.healthvitaminsguide.com
- Information on Vitamins, Minerals, Amino Acids About the Author Dr John Anne

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