Fig. 2

Effect of protocatechuic acid on urea level in the serum of rats exposed to cadmium. ^$Group 2 (Cadmium-induced toxicity) significantly (p < 0.05) different from group 1 (normal control). **Group 3 (Cadmium + 10 mg/kg B.W PCA) and 4 (Cadmium + 20 mg/kg B.W PCA) very significantly (p < 0.05) different from group 2 (Cadmium-induced toxicity). ^#Group 5 (10 mg/kg B.W PCA) not significantly (p > 0.05) different from group 1 (normal control). ^ðGroup 6 (20 mg/kg B.W PCA) significantly (p < 0.05) different from group 1 (normal control)