Effect of moderate intakes of different tea catechins and caffeine on acute measures of energy metabolism under sedentary conditions
Gregersen NT, Bitz C, Krog-Mikkelsen I, Hels O, Kovacs EM, Rycroft JA, Frandsen E, Mela DJ, Astrup A
The British journal of nutrition · 41 citas
Etiquetas de revisión
Financiación no declaradaDatos neutrales que nuestra revisión registró sobre cómo se hizo este estudio. Describen el método, nunca si nos gusta el resultado.
Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación no declarada
Publicación
- Publicado
- 2009-05-18 · Br J Nutr · vol. 102 · número 8 · págs. 1187–1194
- Editorial
- Cambridge University Press
- Citado
- 61 citas · más que el 93% de estudios similares · 4.0× el promedio de su campo
- Impacto
- Entre el 10 % más citado de su campo
- Referencias
- 38 trabajos
- Acceso
- Lectura gratuita
- Áreas de investigación
- Tea Polyphenols and Effects · Coffee research and impacts · Adipose Tissue and Metabolism
- Palabras clave
- tea catechins, caffeine, epigallocatechin gallate, epigallocatechin, green tea, energy expenditure, fat oxidation, respiratory quotient, substrate oxidation, energy metabolism, body composition
- MeSH
- humans, epinephrine, norepinephrine, catechin, caffeine, pulmonary gas exchange, cross-over studies, double-blind method, motor activity, appetite, energy metabolism, oxidation-reduction, heart rate, tea, adult, male, young adult
9 autores
- Nikolaj Ture Gregersen🇩🇰 · autor de correspondenciaUniversity of Copenhagen
- Christian Bitz🇩🇰University of Copenhagen
- Inger Krog-Mikkelsen🇩🇰University of Copenhagen
- Ole Holm Hels🇩🇰Technical University of Denmark
- Eva M. R. Kovacs🇺🇸Unilever (United States)
- Jane A. Rycroft🇬🇧Unilever (United Kingdom)
- Erik Frandsen🇩🇰Glostrup Hospital
- David J. Mela🇳🇱Unilever Research and Development Vlaardingen
- Arne Vernon Astrup🇩🇰University of Copenhagen
Resumen
El texto original del estudio, en el idioma en que se publicó.
Green tea may stimulate energy metabolism; however, it is unclear if acute effects are caused by specific catechins, caffeine or their combination. The objective of the present study was to examine the separate and combined effects of different catechins and caffeine on energy expenditure (EE) and fat oxidation over a single day. Fifteen healthy, normal-weight males received capsules containing placebo, caffeine alone (150 mg), or caffeine plus a catechin mixture (600 mg) enriched in either epigallocatechin-3-gallate (EGCG), epigallocatechin or a mix of catechins, in a randomised cross-over double-blinded design. On each test day EE, respiratory quotient (RQ) and substrate oxidation were measured under sedentary conditions in a respiratory chamber for 13.5 h. We found no significant treatment effect on EE (P = 0.20) or RQ (P = 0.68). EGCG with caffeine insignificantly raised EE and fat oxidation v. caffeine-only and placebo (EE 5.71 (SE 0.12) v. 5.68 (SE 0.14) v. 5.59 (SE 0.13) MJ/12.5 h, respectively; fat oxidation 84.8 (SE 5.2) v. 80.7 (SE 4.7) v. 76.8 (SE 4.0) g/12.5 h). Catechin/caffeine combinations at these dosages and mode of application had non-significant acute effects on EE and fat oxidation. The maximum observed effect on EE of about 2 % could still be meaningful for energy balance over much longer period of exposure. However, higher short-term effects reported in the literature may reflect variations in green tea extracts, added caffeine, or synergies with physical activity. The specific mechanisms and conditions that may underpin observed longer-term benefits of catechin-enriched green tea consumption on body composition remain to be confirmed.
Resumen vía Europe PMC. Los derechos de autor siguen siendo de los autores o la editorial.
Confianza de la comunidad
Cargando…
¿Cuánto confías en los hallazgos de este estudio?
Comentarios
¿Algo está mal aquí?
Señala este estudio si su información, etiquetas o financiación parecen incorrectas. Un editor revisa cada señalamiento.
Información educativa sobre investigación publicada. No es consejo médico ni una recomendación para empezar o dejar nada.