Journal ArticleDOI
Lipophilic and hydrophilic antioxidant capacities of common foods in the United States
Xianli Wu,Gary R. Beecher,Joanne M. Holden,David B. Haytowitz,Susan E. Gebhardt,Ronald L. Prior +5 more
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The data demonstrated that processing can have significant effects on ORAC(FL).Abstract:
Both lipophilic and hydrophilic antioxidant capacities were determined using the oxygen radical absorbance capacity (ORACFL) assay with fluorescein as the fluorescent probe and 2,2‘-azobis(2-amidinopropane) dihydrochloride as a peroxyl radical generator on over 100 different kinds of foods, including fruits, vegetables, nuts, dried fruits, spices, cereals, infant, and other foods. Most of the foods were collected from four different regions and during two different seasons in U.S. markets. Total phenolics of each sample were also measured using the Folin−Ciocalteu reagent. Hydrophilic ORACFL values (H-ORACFL) ranged from 0.87 to 2641 μmol of Trolox equivalents (TE)/g among all of the foods, whereas lipophilic ORACFL values (L-ORACFL) ranged from 0.07 to 1611 μmol of TE/g. Generally, L-ORACFL values were <10% of the H-ORACFL values except for a very few samples. Total antioxidant capacity was calculated by combining L-ORACFL and H-ORACFL. Differences of ORACFL values in fruits and vegetables from different...read more
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Biological effects of essential oils - A review
TL;DR: Findings suggest that, at least in part, the encountered beneficial effects of essential oils are due to prooxidant effects on the cellular level.
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The Chemistry behind Antioxidant Capacity Assays
TL;DR: This analysis suggests that the total phenols assay by FCR be used to quantify an antioxidant's reducing capacity and the ORAC assay to quantify peroxyl radical scavenging capacity, to comprehensively study different aspects of antioxidants.
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Phenolics and polyphenolics in foods, beverages and spices: Antioxidant activity and health effects – A review
TL;DR: A review of phenolic and polyphenolic compounds can be found in this article, which summarizes both the synthetic and natural phenolic antioxidants, emphasizing their mode of action, health effects, degradation products and toxicology.
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Antioxidant activity and phenolic compounds in 32 selected herbs
TL;DR: In this paper, the total equivalent antioxidant capacities (TEAC) and phenolic contents of 32 spices extracts from 21 botanical families grown in Poland were investigated using a Folin-Ciocalteu assay.
Journal ArticleDOI
Comparison of ABTS/DPPH assays to measure antioxidant capacity in popular antioxidant-rich US foods
TL;DR: In this paper, the 50 most popular antioxidant-rich fruits, vegetables and beverages in the US diet were identified and analyzed for their antioxidant capacities, total phenolics and flavonoids content.
References
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Book ChapterDOI
Analysis of total phenols and other oxidation substrates and antioxidants by means of folin-ciocalteu reagent
TL;DR: Aggregate analysis of this type is an important supplement to and often more informative than reems of data difficult to summarize from various techniques, such as high-performance liquid chromatography (HPLC) that separate a large number of individual compounds.
Journal ArticleDOI
Oxidants, antioxidants, and the degenerative diseases of aging
TL;DR: It is argued that this damage to DNA, protein, and lipid is a major contributor to aging and to degenerative diseases of aging such as cancer, cardiovascular disease, immune-system decline, brain dysfunction, and cataracts.
Journal ArticleDOI
A Clinical Trial of the Effects of Dietary Patterns on Blood Pressure
Lawrence J. Appel,Thomas Burton Moore,Thomas Burton Moore,Eva Obarzanek,William M. Vollmer,Laura P. Svetkey,Frank M. Sacks,George A. Bray,Thomas M. Vogt,Jeffrey A. Cutler,Marlene M. Windhauser,Pao-Hwa Lin,Njeri Karanja,Denise G. Simons-Morton,Marjorie L. McCullough,Janis F. Swain,Priscilla Steele,Marguerite Evans,Edgar R. Miller,David W. Harsha +19 more
TL;DR: In this paper, the effects of dietary patterns on blood pressure were assessed in a clinical trial, Dietary Approaches to Stop Hypertension, where the subjects were fed a control diet that was low in fruits, vegetables, and dairy products, with a fat content typical of the average diet in the United States.
Journal ArticleDOI
Flavonoids as Antioxidants
TL;DR: This review presents the current knowledge on structural aspects and in vitro antioxidant capacity of most common flavonoids as well as in vivo antioxidant activity and effects on endogenous antioxidants.
Journal ArticleDOI
Antioxidant activity of plant extracts containing phenolic compounds
Marja P Kähkönen,Anu Hopia,Heikki Vuorela,Jussi-Pekka Rauha,Kalevi Pihlaja,Tytti S. Kujala,Marina Heinonen +6 more
TL;DR: High activities were found in tree materials, especially in willow bark, spruce needles, pine bark and cork, and birch phloem, and in some medicinal plants including heather, bog-rosemary, willow herb, and meadowsweet and potato peel and beetroot peel extracts showed strong antioxidant effects.