Figure 2From: Evaluation of the cytotoxicity, mutagenicity and antimutagenicity of a natural antidepressant, Hypericum perforatum L. (St. John’s wort), on vegetal and animal test systems The mean percentage and standard deviation of the mitotic index (MI) and chromosomal alteration (CA) of acute and subchronic gavage and intraperitoneal treatments for the negative (CO-) and positive (CO+) control groups and for the group treated with three concentrations of St. John´s wort (SJW) (mg/mL). * The results are statistically significant in relation to CO-.Back to article page