Abstract
No significant differences in protein-bound iodine levels and thyroid gland abnormalities were found when two population groups, one group of 106 persons who used water that naturally contained fluorides (3.48 ppm) and one control group of 109 persons who used essentially fluoride-free water, were compared. All subjects has been residents of their respective communities for more than ten years. There were no indications that prolonged ingestion of fluoride affects thyroid gland size or function at the levels studied.
*Study available at https://jada.ada.org/article/S0002-8177(64)92014-8/pdf
-
-
[An investigation on the serum thyroid hormones and fluoride concentrations in patients with endemic fluorosis].
Endemic fluorosis is a systematic disease. We investigated the serum free fluoride, thyroid hormones and TSH concentrations in 37 cases. Significantly lowered serum T4 and T3 and increased TSH were found in patients. Patients' serum rT3 concentrations were not significantly different from the controls. Significant negative correlations were found between
-
The effects of fluoride on thyroid hormones in rabbits
In this study, our objective was to determine blood T3, T4, and TSH levels in rabbits, which were administered fluoride chronically. Twenty one male rabbits were divided into three groups. The rabbits in group I (control), group II and III were administered, respectively, normal drinking water (containing 0.07 ppm fluoride),
-
Fluoride exposure and thyroid function among adults living in Canada: Effect modification by iodine status.
Highlights Higher urinary fluoride levels are not associated with higher TSH levels in the general population of adults living in Canada. Iodine status modifies the relationship between urinary fluoride and TSH levels. Adults in Canada who have moderate-to-severe iodine deficiencies and higher urinary fluoride tend to have higher TSH
-
Effects of fluoride exposure on thyroid hormone level and intelligence in rats.
OBJECTIVE: To investigate the effects of fluoride exposure on the thyroid hormone level and intelligence in rats and to investigate the biomarkers of intellectual impairment induced by high fluoride exposure. METHODS: A total of 24 clean healthy Sprague-Dawley rats were randomly divided into control group (tap water containing 0.344 mg/L fluoride)
-
The physiologic and hygienic aspects of the absorption of inorganic fluorides
Physiologic and hygienic aspects of the absorption of inorganic fluorides are reviewed. Three basic shortcomings in fluoride research are noted: its intake into the system, assimilation, and excretion are subject to great variation between persons; in contrast to extensive biochemical advances in fluoride research, relatively little clinical data is available
Related Studies :
-
-
-
Fluoride, Water Hardness, and Endemic Goitre
Variations in goitre prevalence were found to correlate closely with the fluoride content (p=0-74; P<0-01) and with the hardness (p=0.77; P<0-01) of the water in each village. The effects of fluoride and water hardness seem to be independent.
-
Fluorine in the Aetiology of Endemic Goitre
The distribution of endemic goitre in the Punjab and in England is related to the geological distribution of fluorine and to the distribution of human dental fluorosis (mottled enamel). Inquiry showed the presence of dental fluorosis among school-children in two areas of Somerset where two previous observers had recorded a high incidence of goitre, and the absence of dental fluorosis in an adjoining area selected as control where endemic goitre was absent.
-
Is fluoride-induced hyperthyroidism a cause of psychosis among East African immigrants to Scandinavia?
When people with a compensated fluoride-induced hypothyroidism move to a low-fluoride area, the fluoride-induced inhibition of the production of thyroid hormones ceases. In Scandinavia, the dietary intake of iodine is usually quite high due to iodized table salt and easy access to marine fish. Under these conditions, the elevated capacity for production of thyroid hormones may result in hyperthyroidism.
-
Fluoride's Impact on Thyroid Hormones
Up through the 1950s, doctors in Europe and South America prescribed fluoride for this purpose in patients with hyperthyroidism. (Merck Index 1968). Fluoride was selected as a thyroid suppressant based on findings dating back to the mid-19th century that fluoride is a goitrogen (a substance that can cause goiter). When used as
-
Fluoride Aggravates Thyroid Damage Caused by Excess Iodine Intake
Chinese researchers have found that the combination of excess fluoride with excess iodine caused greater reductions in IQ, or greater increases in goitre than either scenario by itself.
Related FAN Content :
-