Archive for the ‘Iron’ Category

Study: The impact of common micronutrient deficiencies on iodine and thyroid metabolism: the evidence from human studies.

Thursday, September 22nd, 2011

-:: This Abstract is posted here for posterity and archival purposes only ::-

Best Pract Res Clin Endocrinol Metab. 2010 Feb;24(1):117-32.
The impact of common micronutrient deficiencies on iodine and thyroid metabolism: the evidence from human studies.
Hess SY.

Program in International and Community Nutrition, Department of Nutrition, University of California, Davis, CA, USA. syhess@ucdavis.edu
Abstract

Deficiencies of micronutrients are highly prevalent in low-income countries. Inadequate intake of iodine impairs thyroid function and results in a spectrum of disorders. Other common deficiencies of micronutrients such as iron, selenium, vitamin A, and possibly zinc may interact with iodine nutrition and thyroid function. Randomised controlled intervention trials in iodine- and iron-deficient populations have shown that providing iron along with iodine results in greater improvements in thyroid function and volume than providing iodine alone. Vitamin A supplementation given alone or in combination with iodised salt can have a beneficial impact on thyroid function and thyroid size. Despite numerous studies of the effect of selenium on iodine and thyroid metabolism in animals, most published randomised controlled intervention trials in human populations failed to confirm an impact of selenium supplementation on thyroid metabolism. Little evidence is available on interactions between iodine and zinc metabolism.

Copyright 2009 Elsevier Ltd. All rights reserved.

PMID:
20172476
[PubMed - indexed for MEDLINE]
From http://www.ncbi.nlm.nih.gov/pubmed/20172476

Study: The impact of iron and selenium deficiencies on iodine and thyroid metabolism: biochemistry and relevance to public health.

Friday, July 1st, 2011

-:: This Abstract is posted here for posterity and archival purposes only ::-

Thyroid. 2002 Oct;12(10):867-78.

The impact of iron and selenium deficiencies on iodine and thyroid metabolism: biochemistry and relevance to public health.

Zimmermann MB, Köhrle J.

Laboratory for Human Nutrition, Swiss Federal Institute of Technology, Zürich, Switzerland. Michael.zimmermann@ilw.agrt.ethz.ch
Abstract

Several minerals and trace elements are essential for normal thyroid hormone metabolism, e.g., iodine, iron, selenium, and zinc. Coexisting deficiencies of these elements can impair thyroid function.

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Iron deficiency impairs thyroid hormone synthesis by reducing activity of heme-dependent thyroid peroxidase. Iron-deficiency anemia blunts and iron supplementation improves the efficacy of iodine supplementation.

Combined selenium and iodine deficiency leads to myxedematous cretinism. The normal thyroid gland retains high selenium concentrations even under conditions of inadequate selenium supply and expresses many of the known selenocysteine-containing proteins. Among these selenoproteins are the glutathione peroxidase, deiodinase, and thioredoxine reductase families of enzymes.

Adequate selenium nutrition supports efficient thyroid hormone synthesis and metabolism and protects the thyroid gland from damage by excessive iodide exposure.

In regions of combined severe iodine and selenium deficiency, normalization of iodine supply is mandatory before initiation of selenium supplementation in order to prevent hypothyroidism.

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Weston Price – That a Clean Tooth Does Not Decay and that Mouth Cleanliness Affords the Best Known Protection Against Dental Caries

Sunday, December 12th, 2010

This article is posted here for “preservation” and archival reasons, sometimes you come across information online that you want to make sure others read, but the internet world is ever-changing, something maybe available today and gone tomorrow, thus I sometimes re-post articles like the one below here but take NO CREDIT for any of them.

Here is the article:

Weston Price – That a Clean Tooth Does Not Decay and that Mouth Cleanliness Affords the Best Known Protection Against Dental Caries.

Dental Cosmos Page 871 1934: by Weston A Price, DDS:

Oral cleanliness is not the best known means for the control of dental caries because:

(I) Since primitive man has had high immunity to dental caries he becomes our control in the great experiment of civilizations.

It is essential there fore, that we study the controlling factors of his environment, of which he is the product, and use these as our yardstick for studying modern civilization.

For this I have studied remnants of several primitive racial stocks where their physical isolation had sheltered them from the influences of our modern civilization, and by studying them and their foods and their methods of living, certain underlying factors are found to be common to all these primitive groups, even though they were living in different countries and on very different foods. This permits us to critically analyze modern civilizations at their points of contact with the primitives and, by studying them and their problems with the standards of immune primitives, not the factors which are contributing to dental caries.

By studying the children in four isolated valley in Switzerland; Loetschental, Visperterminen, Grachen, and Ayer in the Swiss Alps, I found the incidence of dental caries to be only 4.6 percent of the teeth studied. Here oral prophylaxis and modern equipment for practicing it were largely unknown. At St. Moritz, however, at approximately the same altitude, which is highly modernized community with excellent training in oral prophylaxis, the incidence of caries was 29.8 per cent of teeth studied.

At Vissoie and Zinal, which were partially modernized, 22 percent of the teeth examined had been attacked by dental caries. At Herisau, in the plains country of Switzerland, also a highly modernized community with splendid instruction and equipment for mouth cleanliness, the incidence of cares was 24.7 per cent of the teeth examined.

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