Description Supports: May support respiratory health. Size: 1 oz liquid Suggested Usage: 10 to 30 drops 3 times per day or as directed by your healthcare professional. Contains: Thuja occidentalis (leaf), Purified Water, Ethanol (25%). Hauke, W., Kohler, G., Henneicke-von Zepelin, H. H., and Freudenstein, J. Esberitox N as supportive therapy when providing standard antibiotic treatment in subjects with a severe bacterial infection (acute exacerbation of chronic bronchitis). A multicentric, prospective, double-blind, placebo-controlled study. Chemotherapy 2002;48(5):259-266. Naser, B., Bodinet, C., Tegtmeier, M., & Lindequist, U. (2005). Thuja occidentalis (Arbor vitae): A Review of its Pharmaceutical, Pharmacological and Clinical Properties. Evidence-based complementary and alternative medicine : eCAM, 2(1), 69–78. doi:10.1093/ecam/neh065