Selenite biotransformation during brewing. Evaluation by HPLC-ICP-MS

► Biotransformation of selenium, added as selenite, during brewing has been studied. ► An analytical methodology based on different sample treatment methods and on line coupling anion exchange-ICP-MS was used. ► Biotransformation of selenite during Lager or Ale fermentation (S. cerevisiae or S. uvarum) leads to SeMet in Se-beer. ► Brewing is an example how yeast is able to transform inorganic selenium to bioactive organo-Se compounds.