Fig. 4

Testosterone (ng/ml) in serum of Sprague Dawley (a) and Brown Norway (b) rats at week 12 following weeks of exposure to 20 mg/m3 of GMA-SS, and at week 24 following 12 weeks of recovery. Mean ± standard error (n = 6–12). a Significantly different from Air+Reg diet (p < 0.05); c Significantly different from GMA-SS + Reg diet (p < 0.05)