Essiac has antioxidant activity and exhibits significant immunomodulatory effects, specifically through stimulation of granulocyte phagocytosis, increases in CD8+ cell activation, and moderately inhibiting inflammatory pathways. Essiac exhibits significant cell-specific cytotoxicity towards ovarian epithelial carcinoma cells (A2780). A 20-fold dilution of Essiac showed significant inhibition of several CYP450 enzymes, most notably CYP1A2 (37%) and CYP2C19 (24%). Essiac demonstrated dose-dependent inhibition of clot fibrinolysis.