Yasir M.Ahmed, AbdElkarim A. Abdrabo

Effect of cigarette smoking on serum thyroid hormones i.e. thyroxin (T3) and triiodothyronine (T4) and their regulatory hormone i.e. thyrotrophin (TSH) was evaluated in healthy smoker individuals and compared with non smoker individuals. Enzyme linked immunosorbant assay (ELISA) was used to estimate level of T3, T4 and TSH. The results of study showed that the (Mean ± SD) of T3, T4 and TSH were (1.21±0.26), (6.3±2.0) and (1.27±0.7) respectively in smokers which was not significantly differ when compared with non-smokers (Mean ± SD) of T3, T4 and TSH were (1.31±0.27), ( 6.0±0.7) and (1.33±0.6) respectively.