Chromium as an essential nutrient: a review
Abstract Chromium (Cr) has been studied since the end of the 19th century, when carcinogeniceffects of hexavalent Cr were discovered. Essentiality of trivalent Cr was demonstrated in1959; Cr3+ has been studied in humans and laboratory animals since the 1970s and it isonly since the 1990s that Cr has been studied as an essential element in
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