Effect of a thermogenic beverage on 24-hour energy metabolism in humans
| Autor: | Kevin J. Acheson, Julie Moulin, Luc Tappy, Isabelle Cristiani, Servane Rudelle, Katherine Macé, Mario G. Ferruzzi |
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| Rok vydání: | 2007 |
| Předmět: |
Adult
Male Sympathetic Nervous System Adolescent Endocrinology Diabetes and Metabolism Medicine (miscellaneous) Monitoring Ambulatory Epigallocatechin gallate Excretion Beverages Placebos chemistry.chemical_compound Endocrinology Animal science Catecholamines Double-Blind Method Heart rate medicine Humans Nutrition and Dietetics Cross-Over Studies Thermogenesis Crossover study Blood pressure chemistry Female medicine.symptom Caffeine Energy Metabolism Weight gain |
| Zdroj: | Obesity (Silver Spring, Md.). 15(2) |
| ISSN: | 1930-7381 |
| Popis: | 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 × 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. |
| Databáze: | OpenAIRE |
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