Table 3.

T3, T4, and TSH levels in Long-Evans Hooded rats following drinking water exposure to fluoride

	G1	G2	G3 (10 ppm)	G4 (20 ppm)
T3 (ng/dl)	153.80 ± 5.74 (n = 6)	137.80 ± 6.49 (n = 6)	143.20 ± 8.43 (n = 6)	148.00 ± 4.82 (n = 6)
T4 (μg/dl)	6.86 ± 0.36 (n = 6)	7.03 ± 0.34 (n = 6)	6.35 ± 0.59 (n = 6)	6.70 ± 0.23 (n = 6)
TSH (ng/ml)	18.93** ± 5.70 (n = 6)	2.83 ± 0.44 (n = 6)	2.65 ± 0.53 (n = 6)	2.35 ± 0.61 (n = 6)

Data represents mean ± SEM

Rats were exposed from gestational day 6

G1: standard chow (Teklad 2918)/RO-H₂0

G2: low-F⁻chow (Teklad TD.160173)/RO-H₂0

G3: low-F⁻chow (Teklad TD.160173)/10 ppm F⁻ drinking water

G4: low-F⁻chow (Teklad TD.160173)/20 ppm F⁻ drinking water

**p < 0.01 as compared to G2