Plasma kinetics in man of epicatechin from black chocolate
TLDR
Epicatechin is absorbed from chocolate and is rapidly eliminated from plasma and the maximal concentration and area under the curve of plasma kinetics of both substrates correlated very well with the dose of chocolate.Abstract:
Objective: To evaluate the plasma kinetics in man of epicatechin from black chocolate. Design: An intervention study with 8 volunteers. Each served as his own control. Theobromine was used as control marker of the chocolate intake. Setting: Metabolic Unit, Nestle Research Center, Vers-chez-les-Blanc, Switzerland. Subjects: Eight healthy male volunteers (4 smokers and 4 non-smokers) were enrolled in this study. They abstained from foods rich in polyphenols (coffee, tea, wine, fruit juice, cocoa products) for 24 h prior to the test until its completion. Intervention: Volunteers ate 40 g and 80 g of black chocolate (Nestle Noir) together with bread with a one-week interval. Blood samples were drawn every hour during the first 4 h and a last one at 8 h after chocolate consumption. Plasma samples were analysed for epicatechin and theobromine content by HPLC. Results: Plasma concentrations of epicatechin and theobromine increased markedly after chocolate consumption (P=0.002 and P=0.001, respectively), reaching a maximum between 2 and 3 h. The maximal concentration and area under the curve of plasma kinetics of both substrates correlated very well with the dose of chocolate. Conclusions: Epicatechin is absorbed from chocolate and is rapidly eliminated from plasma. Attainable plasma values are 0.7 μmol/l from 80 g of black chocolate. Sponshorship: Nestec LTD, Vevey, Switzerland.read more
Citations
More filters
Journal ArticleDOI
Polyphenols: food sources and bioavailability
TL;DR: The nature and contents of the various polyphenols present in food sources and the influence of agricultural practices and industrial processes are reviewed, and bioavailability appears to differ greatly between the variousPolyphenols, and the most abundantpolyphenols in the authors' diet are not necessarily those that have the best bioavailability profile.
Journal ArticleDOI
Bioavailability and bioefficacy of polyphenols in humans. I. Review of 97 bioavailability studies
TL;DR: Gallic acid and isoflavones are the most well-absorbed polyphenols, followed by catechins, flavanones, and quercetin glucosides, but with different kinetics, and the least well- absorption polyphenol are the proanthocyanidins, the galloylated tea catech ins, andThe anthocyanins.
Journal ArticleDOI
Dietary (Poly)phenolics in Human Health: Structures, Bioavailability, and Evidence of Protective Effects Against Chronic Diseases
Daniele Del Rio,Ana Rodriguez-Mateos,Jeremy P. E. Spencer,Massimiliano Tognolini,Gina Borges,Alan Crozier +5 more
TL;DR: It is concluded that better performed in vivo intervention and in vitro mechanistic studies are needed to fully understand how (poly)phenol molecules interact with human physiological and pathological processes.
Journal ArticleDOI
Health promotion by flavonoids, tocopherols, tocotrienols, and other phenols: direct or indirect effects? Antioxidant or not?
TL;DR: It is argued that tocopherols and tocotrienols may also exert direct beneficial effects in the gastrointestinal tract and that their return to theintestinal tract by the liver through the bile may be physiologically advantageous.
Journal ArticleDOI
Bioavailability of bioactive food compounds: a challenging journey to bioefficacy
Maarit Rein,Mathieu Renouf,Cristina Cruz-Hernandez,Lucas Actis-Goretta,Sagar K. Thakkar,Marcia da Silva Pinto +5 more
TL;DR: This review focuses on some of the major factors affecting the bioavailability of the aforementioned bioactive food compounds.
References
More filters
Journal ArticleDOI
Structure-antioxidant activity relationships of flavonoids and phenolic acids
TL;DR: The factors underlying the influence of the different classes of polyphenols in enhancing their resistance to oxidation are discussed and support the contention that the partition coefficients of the flavonoids as well as their rates of reaction with the relevant radicals define the antioxidant activities in the lipophilic phase.
Journal ArticleDOI
Flavonoids—Chemistry, metabolism, cardioprotective effects, and dietary sources
N.C. Cook,Samir Samman +1 more
TL;DR: The structural requirements for the antioxidant and free radical scavenging functions of flavonoids include a hydroxyl group in carbon position three, a double bond between carbon positions two and three, carbonyl groups in carbon positions four, and polyhydroxylation of the A and B aromatic rings.
Book
Clinical Pharmacokinetics: Concepts and Applications
Malcolm Rowland,Thomas N. Tozer +1 more
TL;DR: The Third Edition of Clinical Pharmacokinetics features considerations of both stereochemistry and the increasing number of polypeptide and protein drugs being developed.
Book
Applied biopharmaceutics and pharmacokinetics
TL;DR: Applied biopharmaceutics & pharmacokinetics, Applied biophARMaceutics and pharmacokinetic research, کتابخانه دیجیتال شاپور اهواز
Journal ArticleDOI
Absorption, metabolism and health effects of dietary flavonoids in man
TL;DR: In this article, the authors performed a study to quantify absorption of various dietary forms of quercetin glycosides from onions and found that the pure aglycone was absorbed far better than the pure Aglycone.