9 Healthy Foods That Are Rich in Iodine
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The thyroid gland is an important endocrine gland regulating metabolism in every cell of our body. Until a little more than one hundred years ago, the single controlling force for all of the complex processes that go on in the human body was thought to be the nervous system. But there were too many phenomena that, when carefully analyzed, seemed to have no relationship to the nervous system, too many differences in people in iodine source thyroid and energy, for example that iodine source thyroid not be accounted for satisfactorily in terms of nervous activity alone.
The explanation was to be found in certain glands, iodine source thyroid endocrines, of which the thyroid is one and, in fact, one of iodine source thyroid first to be discovered. Because commonly used tests for thyroid function are not accurate particularly when it comes to mild and even some moderate forms of hypothyroidism, and many if not most of those with low thyroid function remain undiscovered. Since the hormones of the thyroid gland regulate metabolism in every cell of the body, a deficiency of thyroid hormones can affect virtually all bodily functions.
The degree of severity of symptoms in the adult range from mild deficiency states which are not detectable with standard blood tests subclinical hypothyroidism to severe deficiency states which can be life-threatening myxedema.
There is an old medical saying that just a few grains of thyroid hormone can make the difference between an idiot and an Einstein. It aptly characterizes the thyroid as a quickener of the tempo of life. All of the endocrine glands play remarkable roles in the body's economy. Unlike the many millions of other glands such as the sweat glands in the skin, the salivary glands in the mouth, the tear glands in the eyes, which perform only local functions, the endocrine glands pour their hormone secretions into the bloodstream which carries them to all parts of the body.
From the pea-sized pituitary gland at the base of the brain come hormones that influence growth, sexual development, uterine contraction in childbirth, and milk release afterward. The adrenals, rising like mushrooms from atop the kidneys, pour out more than a score of hormones, including hydrocortisone and adrenaline needed for the body's response to stress and injury. Also iodine source thyroid the endocrine system are the sex glands - ovaries and testes; the pineal gland in the brain iodine source thyroid hormones play a role in nerve and brain functioning; the thymus behind the breastbone which appears to be involved in establishing the body's immunity function; and areas in the pancreas, the islets of Langerhans, which secrete insulin.
A large majority of the thyroid hormone secreted from the thyroid gland is T4, but T3 is the considerably more active hormone.
Although some T3 is also secreted, the bulk of the T3 is derived by deiodination of T4 in peripheral tissues, by the enzyme thyroid peroxidase especially liver and kidney. Deiodination of T4 also yields reverse T3, a molecule with no known metabolic activity. Deficiency of thyroid hormone may be due to lack of stimulation by the pituitary gland, defective hormone synthesis or impaired cellular conversion iodine source thyroid T4 to T3 often caused by mercury toxicity.
The pituitary gland regulates thyroid activity through the secretion of thyroid-stimulating hormone TSH. The combination of iodine source thyroid thyroid hormone and elevated TSH blood levels usually indicates defective thyroid hormone synthesis, which is defined as primary hypothyroidism.
When TSH and thyroid hormone levels are both low, the pituitary gland is responsible for the low thyroid function, a situation termed secondary hypothyroidism. Normal blood thyroid hormone and TSH blood levels combined iodine source thyroid low functional thyroid activity as defined by a low basal metabolic rate suggest cellular iodine source thyroid. Most estimates on iodine source thyroid rate of hypothyroidism are based on the levels of thyroid hormones in the blood.
This may result in a large number of people with iodine source thyroid hypothyroidism going undetected. Before the use of blood measurements, it was common to diagnose hypothyroidism based on basal body temperature the temperature of the body at rest and Achilles reflex time reflexes are slowed in hypothyroidism. With the advent of sophisticated laboratory measurement of thyroid hormones in the blood, these "functional" tests of thyroid iodine source thyroid fell by the wayside.
However, it is known that the routine blood tests may not be sensitive enough to diagnose milder forms of hypothyroidism. The diagnosis of hypothyroidism by laboratory methods is primarily based on the results of total T4, free T4, T3, and TSH levels.
However, the form that affects the cells the most is T3 triiodothyronine which cells make from T4. If the cells are not able to convert T4 to the four-times more active T3, a person can have normal levels of thyroid hormone in the blood, yet be thyroid-deficient.
The enzyme thyroid peroxidase, converts T4 iodine source thyroid T3 and is blocked by mercury in the body, primarily from dental mercury amalgam fillings and thimerosol, a mercury preservative found in vaccinations and other medicines.
Genistein and daidzein from soy also inactivate thyroid peroxidase enzyme. Only the free hormone exerts biologic activity. The protein-bound hormone is inactive. The saliva test is iodine source thyroid more accurate and sensitive way to assess thyroid function because new technology allows for direct measurement of the free thyroid hormones.
A better way of assessing thyroid function is to measure its effects on the body. This is done by measuring a person's resting metabolic rate, which is controlled by the thyroid gland. Broda Barnes found that measuring basal body temperature iodine source thyroid follows was a good way of assessing basal metabolic rate BMR and thus the body's response to thyroid hormones, regardless of their blood levels. As mild hypothyroidism is the most common form of hypothyroidism, many people with hypothyroidism are going undiagnosed.
The basal body temperature is the most sensitive functional test of thyroid function. The rate of iodine source thyroid increases steadily with advancing age. Using only blood tests, thyroid function is commonly low in older adults. It is the thyroid gland, lying in front of the throat below the Adam's apple and just above the breastbone, which regulates the rate at which the body utilizes oxygen and controls the rate at which various organs function and the speed with which the body utilizes food.
Thyroid secretion is essential for the operation of the cells and, in effect, determines how hot the fire gets in the cell and the speed of activity in the cell. The influence of thyroid secretion on body processes and other organs is incredibly widespread and important. When the thyroid gland is removed from an otherwise normal animal, all iodine source thyroid activity is reduced. After removal of the thyroid gland, excess amounts of water, salts, and protein are retained within the body.
Blood cholesterol also goes up. The thyroid, the body's thermostat, secretes two hormones that regulate body temperature, energy usage, and calorie burning. The thyroid has many effects on all the cells in the body, including the synthesis of RNA protein and consumption iodine source thyroid oxygen by cells, affecting overall bodily metabolism. Thyroid function influences and is influenced by the pituitary, adrenals, parathyroid, and sex glands, all of which work together. The pituitary produces TSH thyroid-stimulating hormonewhich helps iodine source thyroid thyroid hormone production.
Thyroid malfunctioning is also influenced by abnormal immune responses and the iodine source thyroid. People with type-O blood are said to be genetically prone to hypothyroidism and low levels of iodine.
The thyroid plays an important role in growth processes. In the human, growth and maturation fail to take place normally when the thyroid is absent or functioning far below normal. Children lacking normal thyroid function may remain small; their stature can be improved considerably by thyroid supplementation and detoxification started at an early age. Growth of the skin, hair, and nails may be retarded in thyroid deficiency and accelerated again by thyroid treatment.
Healing of bone is delayed in thyroid deficiency. A iodine source thyroid severe anemia may develop in severe hypothyroidism. Thyroid hormone is essential for normal nervous system functioning and reaction time, and hypothyroidism may produce slow reactions and mental sluggishness. Muscle health too is dependent on thyroid secretion and with marked thyroid deficiency the muscles may become sluggish and infiltrated with fat. There are interrelationships between the thyroid and the other endocrine glands.
When, for example, thyroid deficiency is marked, the effect on the sex glands is shown by subnormal sexual development and function and impairment of libido. In hypothyroid women, iodine source thyroid disturbances are present frequently. Estrogen, progesterone, and thyroid hormones are interrelated.
The thyroid is the hormone that regulates metabolic rate. Low thyroid tends to cause low energy levels, cold intolerance, and weight gain. Excess iodine source thyroid causes higher energy levels, feeling too warm, and weight loss.
The thyroid gland makes two versions of thyroid hormone from tyrosine and iodine. Both versions are then enveloped in a relatively large glycoprotein complex called thyroglobulin and stored in the thyroid gland.
To be released into the bloodstream for circulation throughout the body, the hormones are separated from thyroglobulin and bound to a much smaller globulin iodine source thyroid globulin or albumin.
Thyroid's action in the cell is to increase the biosynthesis of enzymes, resulting in heat production, oxygen consumption, and elevated metabolic rate. Thyroid stimulates the oxidation of fatty acids, and reduces cholesterol by oxidizing it into bile acids. Thyroid also stimulates enzymes for protein synthesis and, iodine source thyroid present in excessive amounts, can catabolize destroy muscle protein.
Estrogen causes food calories to be stored as fat. Thyroid hormone causes fat calories to be turned into usable energy. Thyroid hormone and estrogen have opposing actions. Estrogen inhibits thyroid action in the cells, interfering with the binding of thyroid to its receptor. Both hormones have phenol rings at a corner of their molecule. The respiratory enzymes of cells are thyroid-dependent. When thyroid function is low, cellular oxygen is low cellular hypoxia.
Thus, estrogen-induced thyroid interference contributes to less-than-optimal brain function. Iodine source thyroid estrogen may compete with thyroid hormone at the site of its receptor.
In so doing, the thyroid hormone may never complete its mission, creating hypothyroid symptoms despite normal serum levels of thyroid hormone. Progesterone, on the other hand, increases the sensitivity of estrogen receptors for estrogen and yet, at the proper level, inhibits many of estrogen's side effects. GABA gamma-aminobutyric acid is an amino acid iodine source thyroid acts as a neurotransmitter-inhibitor and tends to have a calming effect.
When estrogen interferes with thyroid iodine source thyroid and slows the metabolism of brain cells, it indirectly decreases GABA production and increases brain cell excitability, a factor iodine source thyroid epilepsy.
Hypothyroidism occurs at all ages. In children, mild deficiency may be the cause of behavior problems, or of a mild degree of mental slowness, which often is not abnormal enough to be given much consideration. In children of this type startling results occasionally follow the administration of small doses of thyroid extract. At puberty and in the early teens diminished endurance and a tendency to anemia, nervous disorders, problems with menstrual cycles or digestive disturbances often are explained by a mild degree of hypothyroidism.
Iodine source thyroid physical and nervous exhaustion in young adults, iodine source thyroid depressions of middle life, and aggravated symptoms of menopause may be partially explained on the basis of low thyroid. Late symptoms which simulate senile changes frequently are distinctly improved by the administraion of thyroid extract or iodine supplementation. Undiagnosed thyroid problems can be behind many unidentified symptoms of fatigue, many recurring illnesses, and non-responsive health problems.
The body systems affected by this disorder are quite variable. A lack of thyroid hormones leads to a general decrease in the rate of utilization of fat, protein, and carbohydrate.
Moderate weight gain combined with sensitivity to cold weather cold hands and feet is a common finding. Cholesterol and triglyceride levels are increase iodine source thyroid even the mildest forms of hypothyroidism.