Fig. 5
Comparison between lead levels at baseline (a), 1 week after intentional exposure of hens to 200 mg/kgbody weight/day lead acetate for 1 week (b), 4 weeks without treatment (c), and 4 weeks of sub-chronic treatment with 500 mg/kgbody weight/day ascorbic acid (d) in hen egg-shell, egg-albumen, and egg-yolk samples. ns: not statistically significant, **: p-value < 0.01, *: p-value < 0.05