Another study from Brazil [2] measured
urinary iodine excretation and serum TPOAb and TgAb antibodies from 39 subjects with Hashimoto's, none of whom were receiving treatment at the time of the study.
Another study from western Australia (a region that has previously been shown to be iodine replete) measured
urinary iodine concentration (UIC) of 98 women at 6 months postpartum and checked their thyroid status both postpartum and 12 years later [23].
The median
urinary iodine concentration of Boston - area vegans (78.5 μg / liter) was lower than in the general U.S. adult population (164 μg / liter)(2) and in the Northeast U.S. population (134 μg / liter)(19).
Vegan diets do not contain dairy products and may be the reason for the vegans» lower
urinary iodine levels, although it is reassuring that these were not associated with thyroid dysfunction.
Low
urinary iodine postpartum is associated with hypothyroid postpartum thyroid dysfunction and predicts long - term hypothyroidism.
There are advocates in the U.S., such as Dr. David Brownstein in Michigan, who argues that some people benefit by taking doses in the 30,000 to 50,000 mcg per day range (monitored with
urinary iodine levels).
Both a low initial serum TSH and a high initial
urinary iodine concentration can be predictable factors for a recovery from hypothyroidism due to Hashimoto's thyroiditis after restricting their iodine intake.
In studies that have specifically looked at iodine intake among Japanese people, the mean dietary intake (estimated from
urinary iodine excretion) was in the range of 330 to 500 mcg per day, which is at least 2.5-fold lower than 13.8 mg per day.»
Before introduction of iodized salt and at 10, 20, 40, and 52 weeks, we measured antithyroid peroxidase antibodies (TPO - Ab), antithyroglobulin antibodies (Tg - Ab),
urinary iodine (UI), and thyroid hormones, and examined the thyroid using ultrasound.
There were no differences between Nishihara and Yamagata in
the urinary iodine concentration, but
the urinary iodine concentrations in Kobe and Hotaka were less than those in Nishihara or Yamagata.
Assessment methods include
urinary iodine concentration, goitre, newborn thyroid - stimulating hormone, and blood thyroglobulin.
Assessment methods include
urinary iodine concentration, goiter, newborn TSH, and blood thyroglobulin.
Median
urinary iodine excretion during the observation - interval was 5.2 to 7.2 micrograms / dl.
The urinary iodine excretion was 1.5 mg / day in Nishihara.
A series of studies conducted by the National Health and Nutrition Examination Survey (NHANES) demonstrate that
urinary iodine levels have rapidly declined since the 1970s.
Urinary iodine is the most reliable measure of iodine levels in the body.
In fact, groups with the aforementioned thyroid diseases, as well as individuals with positive TG or TPO antibodies, have been demonstrated to exhibit significantly higher levels of
urinary iodine, the main indicator of iodine nutritional status, compared to healthy controls (3).
90 % of ingested iodine is excreted via renal pathways, such that median spot
urinary iodine concentrations (UIC) will serve as a biomarker for recent dietary iodine intake (1).
Not exact matches
Canadian researcher Andreas Schuld has documented more than 100 studies during the last 70 years that demonstrate adverse effects of fluoride on the thyroid gland.32 Schuld says, «Fluorine, being the strongest in the group of halogens, will seriously interfere with
iodine and
iodine synthesis, forcing more
urinary elimination of ingested
iodine as fluoride ingestion or absorption increases.»
Blood and
urinary samples were taken at time 0, 3, 6, and 12 months after
iodine administration.