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Related Experiment Video

Updated: Jul 7, 2025

Extraction and Purification of Polyphenols from Freeze-dried Berry Powder for the Treatment of Vascular Smooth Muscle Cells In Vitro
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Food Polyphenols as Preventive Medicine.

Joseph Kanner1,2

  • 1Department of Food Science, ARO, Volcani Center, Bet-Dagan 7505101, Israel.

Antioxidants (Basel, Switzerland)
|December 23, 2023
PubMed
Summary

Dietary polyphenols combat chronic diseases by neutralizing reactive oxygen species (ROS) in the gut. These compounds act as antioxidants and signaling molecules, promoting cellular adaptation and survival.

Keywords:
NF-κBNrf2antioxidantsdieteustresslipid peroxidationpolyphenolsreactive carbonylssignaling factorsstomachtiming

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Area of Science:

  • Food Science
  • Biochemistry
  • Human Physiology

Background:

  • Reactive oxygen species (ROS) initiate oxidation of dietary components, contributing to chronic diseases and cancer.
  • Oxidized lipids and their byproducts (ALEs) pose health risks.
  • Polyphenols and their derivatives show promise in disease prevention.

Purpose of the Study:

  • To investigate the protective mechanisms of dietary polyphenols against ROS-induced damage.
  • To elucidate the role of polyphenols in modulating gastrointestinal and cellular processes.

Main Methods:

  • Review of epidemiological, human clinical, and animal studies.
  • Analysis of polyphenol activity in the gastrointestinal tract and blood systems.
  • Examination of cellular signaling pathways affected by polyphenols.

Main Results:

  • Polyphenols act as reducing agents, free radical scavengers, and reactive carbonyl trappers in the gut.
  • They modulate enzyme activity, influence gut microbiota, and regulate cellular signaling.
  • At low concentrations, polyphenols generate signaling molecules (electrophiles, H2O2) that activate protective pathways (PI3K/Akt, Nrf2/eNOS) and inhibit inflammation (NF-κB).

Conclusions:

  • Dietary polyphenols are crucial for preventing chronic diseases by mitigating ROS effects.
  • Their efficacy depends on critical timing and concentration.
  • Polyphenols promote cellular resilience through eustress, adaptation, and survival mechanisms.