Year 2019

• Dietary antioxidants as a source of hydrogen peroxide

  Publication

  • M. Grzesik
  • G. Bartosz
  • I. Stefaniuk
  • M. Pichla
  • J. Namieśnik
  • I. Sadowska-Bartosz

  - FOOD CHEMISTRY - Year 2019

  Studies of 54 antioxidants revealed that 27 of them, mainly polyphenols, generated hydrogen peroxide (H2O2) when added to Dulbecco’s modified Eagle’s medium (DMEM), other media used for culture of mammalian and yeast cells and phosphate-buffered saline. The most active antioxidants were: propyl gallate (PG), (−)-epigallocatechin gallate (EGCG) and quercetin (Q). Chelex treatment and iron chelators decreased H2O2 generation suggesting...

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Year 2018

• Antioxidant properties of ferrous flavanol mixtures

  Publication

  • M. Grzesik
  • G. Bartosz
  • A. Dziedzic
  • D. Narog
  • J. Namieśnik
  • I. Sadowska-Bartosz

  - FOOD CHEMISTRY - Year 2018

  Interaction of metal, especially iron ions with flavanols is considered as an important feature of these compounds and is believed to contribute to their both antioxidant and prooxidant properties. The aim of this study was to examine how Fe2+ binding to form a 4:1 (flavanol:Fe2+) mixtures affects the antioxidant properties of flavanols. ABTS∗ scavenging, protection against fluorescence bleaching induced by AAPH and hypochlorite,...

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