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2019: Thyroid Cancer and Fluoride - North Dakota

Posted: Thu Jul 02, 2020 8:30 am
by admin
Schwartz GG, Klug MG - "Thyroid Cancer Incidence Rates in North Dakota are Associated with Land and Water Use." Int J Environ Res Public Health 16(20):3805 (2019)
"Our finding that thyroid cancer incidence rates are associated with the use of city water was unexpected and merits examination in other locations with a mix of city and well water use."
"Our finding for city water use raises questions about factors associated with city water that could influence TC (Thyroid Cancer) risk. City water differs from well water in several respects; the most obvious are that city water is chlorinated and fluoridated. Data on the effects of chlorine on the thyroid are limited. However, studies with human volunteers indicate a lack of significant changes in thyroid hormone levels in adults consuming chlorinated water at a concentrations of 2 and 20 parts per million (mg/L) [37,38]. Conversely, there is evidence that fluoride may cause thyroid dysfunction [39]. Specifically, experimental studies in animals and observational studies in humans have reported alterations in thyroid hormone levels (e.g., T4, T3) and/or an increase in thyroid stimulating hormone (TSH) in individuals consuming fluoridated water [40,41,42]. Increases in TSH thus could promote the growth of latent TCs [43,44]. During the time period 1992–2006, the percentage of North Dakotans receiving city water that was “optimally fluoridated” (defined by the CDC as fluoride levels of 0.7–1.2 ppm) was > 96% (vs. 69.2% for the U.S. overall) [45]. In this regard, significant upregulation of TSH was reported among consumers of fluoridated water with levels as low as 0.5 mg/L [0.5 ppm] [46]."

"Our finding that city water use is associated with higher TC risk was unexpected and should be interpreted cautiously. However, it is consistent with several reports implicating fluoride as a cause of thyroid dysfunction and thus merits further investigation."

PFPC Newsletter #7

Posted: Thu Jul 02, 2020 8:56 am
by wendy
Please see our Newsletter from 2000 on this issue:

PFPC Newsletter #7: Thyroid Cancer ... ter_7.html

Thyroid Cancer in China

Posted: Thu Jul 02, 2020 9:04 am
by wendy
In China fluoride is openly acknowledged as cause of thyroid cancer and government programs have re-settled many thousands of farmers living in fluoride-contaminated areas.

3) MA LIE, China Daily staff, 12/08/1999 Copyright© by China Daily

"Shaanxi to move poorest of the poor from hills"

XI'AN -- Shaanxi, an inland province in Northwest China, plans to move its poor farmers from high mountainous slopes within the next three years as part of a poverty eradication drive here. Zhang Wei, deputy governor in charge of the programme, said Shaanxi still has nearly 2 million people living below the poverty line. About 244,700 people are kept poor by geography, as they live in areas that prevent them from having basic living amenities, as farmland and water. "In southern Shaanxi's Qinba Mountains, some farmers are living on high mountainside where crops cannot be planted in the extreme cold weather," Zhang said.

In some other places farmers suffer from Kaschin-Beck's disease and thyroid tumours because of fluoridated underground water, Zhang said. "In the past these farmers got relief from the local government every year, but in such poor geographical conditions, they could not lift themselves out of poverty, so the government decided to move them to better places," the deputy governor said.The poorest farmers live mostly in northern Shaanxi's Baiyu Mountains and southern Shaanxi's Qinba Mountains, will be moved to rural plains areas in the county and resettled in newly built villages.

The provincial and county-level governments will invest 489.4 million yuan (US$59 million) in the resettlement programme over three years, at an average of 2,000 yuan ($241) per farmer, the deputy governor said. Farmers will be allowed to decide whether or not to move, or given the option to move elsewhere. The local government will also sign contracts with farmers to safeguard their rights, Zhang said.

The resettlement programme, which has already been put into place on a trial basis, has already relocated more than 20,000 people. The province plans to resettle another 70,000 this year. In order to ensure success, the provincial government also signed agreements with county-level officials, Zhang said. Neighbouring Gansu Province and the Ningxia Hui Autonomous Region, which have the same problems, have relocated at least 700,000 people through similar efforts.

"The central government desires that poverty-stricken farmers be lifted out of poverty by 2000, and we can meet the goal in Shaanxi if we are successful in the resettlement programme, because the 244,700 farmers are the hardest cases," Zhang said.