1. Institute of Medicine (IOM) Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium and Zinc. National Academies Press; Washington, DC, USA: 2001. [PubMed] [Google Scholar] 2. Burton G.W., Ingold K.U. beta-Carotene: An unusual type of lipid antioxidant. Science. 1984;224:569–573. [PubMed] [Google Scholar] 3. Bannister B., Gibsburg G., Shneerson T. Cardiac arrest due to liquoriceinduced hypokalaemia. Br. Med. J.