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The same workers found that injected selenium protected deficient rats against diquat toxicity before appreciable amounts of glutathione peroxidase activity appeared in the tissues

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Reza, M., Kadkhodai, M., Dabidi, V., et al

Dosing protocols vary widely across studies, ranging from micrograms to milligrams depending on route and intended outcome

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[DOI] [PubMed] [Google Scholar] Munzer A, Sack U, Mergl R, Schnherr J, Petersein C, Bartsch S, Kirkby KC, Bauer K, Himmerich H (2013) Impact of antidepressants on cytokine production of depressed patients in vitro