HER2 Support Group Forums - View Single Post - Iodine deficiency ! - falling intakes - goitregens

R.B. · 11-08-2013, 04:04 PM

Interestingly Dr Flechas reports that patients low in iodine have difficulty perspiring.

Between maybe 19 - 40micrograms per liter (and more in those with high iodine intake can be lost in sweat). The 19 mcg was lost in Irish subjects who are reported as having low iodine.

The second summary below suggests that considerable quantities of microminerals can also be lost in sweat.

The amount of iodine in sweat is fairly stable http://www.ncbi.nlm.nih.gov/pubmed/2086989

This reference book is the most comprehensive single source of information on sweating and iodine I have found - pages 569 onwards http://books.google.com/books?id=7v7...ciency&f=false

The first paper showed that very active sports persons were at much higher risk of grade 1 goitre that sedentary students.

So it appears that those low in iodine who take significant exercise are at greater risk of iodine deficiency. A high intake of iodine blockers would add to the problem - viz flouride chloride and perchlorate in the water they use to replenish the sweat loss.

Arch Environ Health. 2001 May-Jun;56(3):271-7.
Electrolyte loss in sweat and iodine deficiency in a hot environment.
Mao IF, Chen ML, Ko YC.
Source

Institute of Environmental Health Sciences, College of Medicine, National Yang-Ming University, Taipei, Taiwan.
Abstract

The authors studied electrolyte loss from profuse sweating in soccer-team players and evaluated the relationship between this source of iodine loss and iodine deficiency. Thirteen male soccer-team players and 100 sedentary students from the same high school were evaluated for 8 d, during which the players were training. The authors analyzed 208 sweat samples to determine losses of iodine, sodium, potassium, and calcium in sweat. Excretion of urinary electrolytes by the subjects was also measured. The mean losses of iodine, sodium, potassium, and calcium in sweat following a 1-hr game were 52 microg, 1,896 mg, 248 mg, and 20 mg, respectively; the ratios of sweat loss to urinary daily loss of the four electrolytes were 0.75, 0.2, 1.88, and 0.92, respectively. Urinary iodine was significantly (p < .02) lower than the normal level of 50 microg/gm creatinine in 38.5% of the soccer players, compared with 2% of the sedentary students. Forty-six percent of the players had Grade I goiter, compared with a mere 1% of the sedentary students (p < .01). The results of the study suggest that loss of iodine through profuse sweating may lead to iodine deficiency, and loss of electrolytes through sweating may have a dietary significance for heat-stressed individuals or for individuals who perform heavy workloads.

Accession Number : AD0447382

http://oai.dtic.mil/oai/oai?verb=get...fier=AD0447382

Title : THE TRACE MINERAL LOSSES IN SWEAT,

Corporate Author : ARMY MEDICAL RESEARCH AND NUTRITION LAB DENVER CO

Personal Author(s) : Consolagio, Frank C. ; Nelson, Richard A. ; Matough, Leroy O. ; Hughes, Ronald C. ; Urone, Paul

Report Date : 18 AUG 1964

Pagination or Media Count : 14

Abstract : The results of this study show that considerable quantities of the trace minerals, including zinc, selenium, copper, cobalt, iodine, strontium, molybdenum, nickel, lead and chromium, are excreted in sweat, under conditions that produce profuse sweating. These losses are extremely important since they reflect losses that should be included in balance studies, which would greatly aid in evaluating more realistically the minimal daily requireents. As in previous studies, the excretion of these trace minerals in sweat decreases appreciably during acclimatization to hot environments. (Author)

11-08-2013, 04:04 PM	#66
R.B. Senior Member Join Date: Mar 2006 Posts: 1,843	Re: Iodine deficiency ! - falling intakes - goitregens - competition bromine and fluo Interestingly Dr Flechas reports that patients low in iodine have difficulty perspiring. Between maybe 19 - 40micrograms per liter (and more in those with high iodine intake can be lost in sweat). The 19 mcg was lost in Irish subjects who are reported as having low iodine. The second summary below suggests that considerable quantities of microminerals can also be lost in sweat. The amount of iodine in sweat is fairly stable http://www.ncbi.nlm.nih.gov/pubmed/2086989 This reference book is the most comprehensive single source of information on sweating and iodine I have found - pages 569 onwards http://books.google.com/books?id=7v7...ciency&f=false The first paper showed that very active sports persons were at much higher risk of grade 1 goitre that sedentary students. So it appears that those low in iodine who take significant exercise are at greater risk of iodine deficiency. A high intake of iodine blockers would add to the problem - viz flouride chloride and perchlorate in the water they use to replenish the sweat loss. Arch Environ Health. 2001 May-Jun;56(3):271-7. Electrolyte loss in sweat and iodine deficiency in a hot environment. Mao IF, Chen ML, Ko YC. Source Institute of Environmental Health Sciences, College of Medicine, National Yang-Ming University, Taipei, Taiwan. Abstract The authors studied electrolyte loss from profuse sweating in soccer-team players and evaluated the relationship between this source of iodine loss and iodine deficiency. Thirteen male soccer-team players and 100 sedentary students from the same high school were evaluated for 8 d, during which the players were training. The authors analyzed 208 sweat samples to determine losses of iodine, sodium, potassium, and calcium in sweat. Excretion of urinary electrolytes by the subjects was also measured. The mean losses of iodine, sodium, potassium, and calcium in sweat following a 1-hr game were 52 microg, 1,896 mg, 248 mg, and 20 mg, respectively; the ratios of sweat loss to urinary daily loss of the four electrolytes were 0.75, 0.2, 1.88, and 0.92, respectively. Urinary iodine was significantly (p < .02) lower than the normal level of 50 microg/gm creatinine in 38.5% of the soccer players, compared with 2% of the sedentary students. Forty-six percent of the players had Grade I goiter, compared with a mere 1% of the sedentary students (p < .01). The results of the study suggest that loss of iodine through profuse sweating may lead to iodine deficiency, and loss of electrolytes through sweating may have a dietary significance for heat-stressed individuals or for individuals who perform heavy workloads. Accession Number : AD0447382 http://oai.dtic.mil/oai/oai?verb=get...fier=AD0447382 Title : THE TRACE MINERAL LOSSES IN SWEAT, Corporate Author : ARMY MEDICAL RESEARCH AND NUTRITION LAB DENVER CO Personal Author(s) : Consolagio, Frank C. ; Nelson, Richard A. ; Matough, Leroy O. ; Hughes, Ronald C. ; Urone, Paul Report Date : 18 AUG 1964 Pagination or Media Count : 14 Abstract : The results of this study show that considerable quantities of the trace minerals, including zinc, selenium, copper, cobalt, iodine, strontium, molybdenum, nickel, lead and chromium, are excreted in sweat, under conditions that produce profuse sweating. These losses are extremely important since they reflect losses that should be included in balance studies, which would greatly aid in evaluating more realistically the minimal daily requireents. As in previous studies, the excretion of these trace minerals in sweat decreases appreciably during acclimatization to hot environments. (Author)