(A–D) Levels of plasma ALT (A), AST (B), ALP (C) and GGT (D) of control, heavy metals, heavy metals plus vitamin E and vitamin E treated mice. ∗P < 0.05: Student’s t-test, significant levels shown for difference between control and treated groups. ∗∗P < 0.05: Student’s t-test, significant levels shown for difference between mice treated with heavy metals and heavy metals plus vitamin E or vitamin E. ∗∗∗P < 0.05: Student’s t-test, significant levels shown for difference between mice treated with heavy metals plus vitamin E and vitamin E.