... Selenium is used to reduce heavy metals and xenobiotic toxicity (Ganther, 1980), prevent the endemic fatal cardiomyopathy called "Keshan" disease (Yang et al., 1983), and treat muscular dystrophy appearing in patients on longterm parenteral nutrition (Van Rij et al., 1979). Likewise, B prevents and treats various forms of arthritis, as well as improves psychomotor response, brain function and estrogen ingestion response in postmenopausal women (Havercroft and Ward, 1991;Nielsen, 1994;Nielsen et al., 1987Nielsen et al., , 1990Shah and Vohora, 1990;Travers et al., 1990). In excess, however, Se increases the risks of developing breast, colorectal and kidney cancers, melanoma and lymphoid neoplasms, Parkinson's disease, and amyotrophic lateral sclerosis (ALS) (Ayaz et al., 2008;Brtko and Filipcik, 1994;Chatterjee and Banerjee, 1982;Maraldi et al., 2011;Stoica et al., 2000;Vinceti et al., 1995Vinceti et al., , 1996Vinceti et al., , 1998Vinceti et al., , 2013 while B causes nausea, vomiting, diarrhea, abdominal cramps, erythematous lesions on the skin and mucous membranes, circulatory collapse, tachycardia, cyanosis, delirium, convulsions, and coma (Beyer et al., 1983;Siegel and Wason, 1986). ...