TABLE 5.

Serum thyroid hormone levels of SD rats treated with sodium p-hydroxybenzoate for 90 days.

	sodium p-hydroxybenzoate (mg/kg)
	0	125	250	500
NO. of animals examined	10	10	10	10
Males
T3 (ng/ml)	1.14 ± 0.26	1.08 ± 0.23	1.11 ± 0.15	1.10 ± 0.17
T4 (ng/ml)	41.47 ± 3.81	40.78 ± 2.56	42.16 ± 2.82	41.88 ± 2.19
TSH (ng/ml)	4.12 ± 0.24	4.20 ± 0.19	4.16 ± 0.20	4.08 ± 0.24
Females
T3 (ng/ml)	1.25 ± 0.27	1.27 ± 0.15	1.17 ± 0.13	1.24 ± 0.18
T4 (ng/ml)	28.66 ± 3.66	29.59 ± 3.18	27.64 ± 2.26	28.45 ± 2.88
TSH (ng/ml)	2.37 ± 0.19	2.29 ± 0.12	2.20 ± 0.12	2.19 ± 0.14

T3, triiodothyronine; T4, thyroxine; TSH, thyroid-stimulating hormone.

Data are expressed as means ± SD. *p < 0.05, (significantly different from the control group).

One-way ANOVA test and Bonferroni test.