Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 476 (2), 107-12

Are Polyphenols Antioxidants or Pro-Oxidants? What Do We Learn From Cell Culture and in Vivo Studies?

Affiliations

Are Polyphenols Antioxidants or Pro-Oxidants? What Do We Learn From Cell Culture and in Vivo Studies?

Barry Halliwell. Arch Biochem Biophys.

Abstract

Diets rich in polyphenols are epidemiologically associated with lower risk of developing some age-related diseases in humans. This apparent disease-protective effect of polyphenols is often attributed to their powerful antioxidant activities, as established in vitro. However, polyphenols can also exert pro-oxidant activities under certain experimental conditions. Neither pro-oxidant nor anti-oxidant activities have yet been clearly established to occur in vivo in humans, nor are they likely given the limited levels of polyphenols that are achievable in vivo after consumption of foods and beverages rich in them. Other actions of polyphenols may be more important in vivo. Many studies of the biological effects of polyphenols in cell culture have been affected by their ability to oxidise in culture media, and awareness of this problem can avoid erroneous claims.

Similar articles

See all similar articles

Cited by 108 articles

See all "Cited by" articles

Publication types

LinkOut - more resources

Feedback