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    Endocrinol Exp. 1976;10(4):289-95.

    Effect of long-term fluoride administration on thyroid hormones level blood in rats.

    Bobek S, Kahl S, Ewy Z.

    The effect of 2 months fluoride administration (0.1 and 1.0 mg daily/rat) on thyroxine and triiodothyronine level in blood and T3-resin uptake ratio was investigated in rats. In addition, free thyroxine index was calculated from serum thyroxine level and T3-resin uptake ratio. It was found that fluoride administration caused: 1. decrease in thyroxine and triiodothyronine level in plasma; 2. decrease in free thyroxine index values; 3. Increase in T3-resin uptake ratio. From these observations as well as from previous experiments it was concluded that fluoride given continuously to the rats may influence the thyroid gland rather indirectly by changing thyroid hormone transportation in the blood.

    PMID: 1087230 [PubMed - indexed for MEDLINE]

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    • Thyroid (Armour® Thyroid)

      Thyroid is a hormone produced by the body. When taken correctly, thyroid is used to treat the symptoms of hypothyroidism (a condition where the thyroid gland does not produce enough thyroid hormone). Symptoms of hypothyr...

    • Levothyroxine (Levothroid®, Levoxyl®, Synthroid®, ...)

      Levothyroxine, a thyroid hormone, is used to treat hypothyroidism, a condition where the thyroid gland does not produce enough thyroid hormone. Without this hormone, the body cannot function properly, resulting in poor g...

    • Fluoride (ACT®, APF Gel®, Control Rx®, ...)

      Fluoride is used to prevent tooth decay. It is taken up by teeth and helps to strengthen teeth, resist acid, and block the cavity-forming action of bacteria. Fluoride usually is prescribed for children and adults whose h...

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