title: The Role of polyphenols in the modulation of plasma Non-Enzymatic Antioxidant Capacity (NEAC).
abstract: Dietary polyphenols have been shown to scavenge free radicals, modulating cellular redox transcription factors in different in vitro and ex vivo models. Dietary intervention studies have shown that consumption of plant foods modulates plasma Non-Enzymatic Antioxidant Capacity (NEAC), a biomarker of the endogenous antioxidant network, in human subjects. However, the identification of the molecules responsible for this effect are yet to be obtained and evidences of an antioxidant in vivo action of polyphenols are conflicting. There is a clear discrepancy between polyphenols (PP) concentration in body fluids and the extent of increase of plasma NEAC. The low degree of absorption and the extensive metabolism of PP within the body have raised questions about their contribution to the endogenous antioxidant network. This work will discuss the role of polyphenols from galenic preparation, food extracts, and selected dietary sources as modulators of plasma NEAC in humans.
authors.affiliation: Antioxidant Research Laboratory, National Institute for Food and Nutrition Research, IT-00178 Rome, Italy. serafini_mauro@yahoo.it
authors.forename: Mauro
authors.initials: M
authors.lastname: Serafini
authors.forename: Giuseppa
authors.initials: G
authors.lastname: Morabito
mesh_terms: D000975:Antioxidants / Q000008:administration & dosage / Q000032:analysis*; D015415:Biomarkers; D001826:Body Fluids / Q000737:chemistry; D005638:Fruit / Q000737:chemistry; D019833:Genistein / Q000008:administration & dosage; D006304:Health Status; D006801:Humans; D029561:Lythraceae / Q000737:chemistry; D010936:Plant Extracts / Q000008:administration & dosage; D059808:Polyphenols / Q000008:administration & dosage* / Q000032:analysis / Q000493:pharmacokinetics; D012639:Seeds / Q000737:chemistry; D027843:Vitis / Q000737:chemistry; D014920:Wine / Q000032:analysis
chemical_list: D000975:Antioxidants; D015415:Biomarkers; D010936:Plant Extracts; D059808:Polyphenols; D019833:Genistein