Effect of a thermogenic beverage on 24-hour energy metabolism in humans.
Details
Serval ID
serval:BIB_E14609DB066B
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Effect of a thermogenic beverage on 24-hour energy metabolism in humans.
Journal
Obesity
ISSN
1930-7381
Publication state
Published
Issued date
02/2007
Peer-reviewed
Oui
Volume
15
Number
2
Pages
349-355
Language
english
Notes
Publication types: Journal Article ; Randomized Controlled Trial
Abstract
OBJECTIVE: To test whether consumption of a beverage containing active ingredients will increase 24-hour energy metabolism in healthy, young, lean individuals. RESEARCH METHOD AND PROCEDURES: Thirty-one male and female subjects consumed 3 x 250-mL servings of a beverage containing green tea catechins, caffeine, and calcium for 3 days in a single-center, double-blind, placebo-controlled, cross-over design study. On the 3rd day, 23-hour energy metabolism, extrapolated to 24-hour, was measured in a calorimeter chamber. Blood pressure and heart rate were measured, and total day and night urines were analyzed for urea and catecholamine excretion. RESULTS: Twenty-four-hour energy expenditure (EE) and 24-hour fat oxidation were lower in women than in men (p < 0.0001 and p < 0.015, respectively). Although there were no treatment or treatment/gender effects on substrate oxidation, treatment increased 24-hour EE by 106 +/- 31 kcal/24 hours (p = 0.002), equivalent to 4.7 +/- 1.6 kcal/h (day; p = 0.005) and 3.3 +/- 1.5 kcal/h (night; p = 0.04). No significant differences were observed in hemodynamic parameters. DISCUSSION: The present study provides evidence that consumption of a beverage containing green tea catechins, caffeine, and calcium increases 24-hour EE by 4.6%, but the contribution of the individual ingredients cannot be distinguished. Although this increase is modest, the results are discussed in relation to proposed public health goals, indicating that such modifications are sufficient to prevent weight gain. When consumed regularly as part of a healthy diet and exercise regime, such a beverage may provide benefits for weight control.
Keywords
Adolescent, Adult, Beverages, Catecholamines/urine, Cross-Over Studies, Double-Blind Method, Energy Metabolism/drug effects, Female, Humans, Male, Monitoring, Ambulatory, Placebos, Sympathetic Nervous System/drug effects, Sympathetic Nervous System/metabolism, Thermogenesis/drug effects
Pubmed
Web of science
Create date
24/01/2008 14:36
Last modification date
20/08/2019 17:05