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Effects of additional cysteine in fish diet on mercury concentration

•This study provides information for the feed industry in aquaculture.•The use of cysteine as an additive in fish diet reduces mercury concentration.•The effects of mercury toxin and effectiveness of dietary cysteine were observed. Mercury contamination, especially of seafood, continues to attract p...

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Bibliographic Details
Published in:Food chemistry 2014-03, Vol.147, p.340-345
Main Authors: Mok, W.J., Hatanaka, Y., Seoka, M., Itoh, T., Tsukamasa, Y., Ando, M.
Format: Article
Language:English
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Summary:•This study provides information for the feed industry in aquaculture.•The use of cysteine as an additive in fish diet reduces mercury concentration.•The effects of mercury toxin and effectiveness of dietary cysteine were observed. Mercury contamination, especially of seafood, continues to attract public concern. Cysteine, NH2CH(CH2SH)COOH, is a naturally occurring hydrophobic amino acid that contains a thiol group. The purpose of our study was to investigate the use of the additive cysteine in fish diets to reduce mercury concentration in fish, and to observe the effectiveness of dietary cysteine in fish livers. Diets containing 1% and 10% cysteine successfully decreased mercury concentrations in fish compared with the 0% cysteine diet. The liver may have formed excessive lipid droplets or was unable to mobilize lipid stores during exposure to mercury; additional cysteine could help to mobilize excessive lipids in it.
ISSN:0308-8146
1873-7072
DOI:10.1016/j.foodchem.2013.09.157