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9/1/12

El Café | Una Fuente de Antioxidantes



La edición de este mes, de la prestigiosa revista sobre salud de "Life Extension Organization" (LEO), nos da nueva luz sobre los beneficiosos que puede aportar a nuestra salud el café. Aqui hay una traducción,  y sumario del articulo,  que después puedes leer entero pinchando en "LEO"


Numerosos estudios muestran resultados que con el aumento del consumo diario de café existe un menor riesgo de desarrollar diabetes, enfermedades cardiovasculares, cáncer, alzheimer y un número importante de otras enfermedades crónicas, ej. como la obesidad.

Hay una serie de fitoquímicos, el más predominante el ácido clorogénico, que el café ofrece y actúa como protección contra enfermedades. De interés es la capacidad adicional de los polifenoles del café para ejercer acciones directas sobre las células biológicas. Por ejemplo, el consumo de café a diario puede modificar las enzimas clave que mejoran la señalización intracelular que puede proteger contra la diabetes, algunos canceres y muchas otras enfermedades.


El beneficio está relacionado con la dosis. Beber sólo una taza de café al día - con cafeína o descafeinado - puede disminuir el riesgo de desarrollar diabetes en un 13%. Sin embargo, 12 tazas al día recortan el riesgo de desarrollar diabetes en un 67%. Esto si, 12 tazas es mucha cafeína y puede ser contraproducente para aquellos con dificultad de dormir, con arritmias de corazón o sufren de estrés.


Mientras que la medicina tradicional lucha una batalla imposible contra una ola de diabetes, cáncer, alzheimer y otras enfermedades relacionadas con la edad, una extensa serie de investigaciones sugieren que el café - lejos de ser un placer culpable que debe ser limitado - es un "elixir" totalmente natural y de relativo bajo coste . Con la disponibilidad de los nuevos cafés de "retención de los polifenoles", los bebedores moderados de café pueden ahora obtener los innumerables beneficios que estaban reservados sólo para los llamados usuarios "pesados" del café.

ANTIOXIDANTES

Se recuerda de nuevo, quedan, no obstante, un porcentaje significativo de personas que son sensibles a los efectos estimulantes de la cafeína sobre el sistema nervioso central, o se encuentran que produce acidez en el estomago y otros problemas digestivos en respuesta a la ingestión de un vaso de café.


Cómo el café protege contra un espectro de enfermedades:
Más de 1.000 compuestos forman la fitoquímica del café. Su protección documentada contra la diabetes, la enfermedad de alzheimer, el cáncer y una serie de otras enfermedades crónicas puede ser debido a una intrincada red de acciones inducidas químicamente a lo largo de varias vías biológicas. Presuntos mecanismos incluyen:


1. Combinada acción antioxidante.
2. La disminución de almacenamiento de la glucosa.
3. Mejoró en la sensibilidad a la insulina.
4. Movilización del glucógeno en los músculos.
5. La oxidación de la grasa muscular estimulado.
6. Reducción de la actividad de las enzimas inflamatorios.
7. Niveles más altos de las enzimas de desintoxicación.
8. Mejora de la señalización intracelular.
9. Aumento de la sensibilidad de los receptores de las células.
10. Cambios en la expresión genética.
11. Estimulación prebiótico de bacterias beneficiosas.
12. Protección contra la muerte de células neuronales.
13. Disminución de metales como el hierro (exceso).
14. Mejoras metabólicas de los adipocitos y la función hepática.
15. Prevención de la disfunción de la barrera hemato-encefálica (BHE).
16. Niveles más bajos de la placa beta-amiloide.
17. La supresión de las enzimas que producen la placa beta-amiloide.


Pero hay más beneficios que salen de los últimos estudios clínicos:


Los beneficios de la fitoquímica complejo del café no terminan con lo ya mencionando:


- El café, descafeinado o con cafeína, reduce el riesgo de cálculos renales en las mujeres en un 9 y un 10% respectivamente.
- El café, con cafeína, reduce la incidencia de cálculos biliares y la enfermedad de la vesícula biliar en hombres y mujeres
- Los científicos encontraron que el café aumentó la pérdida de peso regular de 8 libras de grasa corporal y promueve el metabolismo.
- Para los atletas, la cafeína contribuye a un dolor muscular reducida, aumento de la energía (ayudas ergogénicas) y una mayor fuerza.
- Un estudio encontró que la cafeína, tomada 2 horas antes de hacer ejercicio, evitar asma durante ejercicio.
- Confirma una investigación, según un estudio del 2011 sobre más de 50.000 mujeres, que cuatro tazas de café al día redujo el riesgo de depresión en un 20%, comparado con los que no tomaban café.
- Propiedades antibacterianos en el café inhibe la formación de la placa dental y previene caries.
- Sea con cafeína o descafeinado, el consumo de café previene el estreñimiento, a pesar del mito que el café deshidrata el cuerpo, contribuye a los "movimientos" fluidos del cuerpo.
- La cafeína se cree aumentar en un 40% la eficacia de los analgésicos contra el dolor de cabeza. La cafeína también ayuda al cuerpo a absorber los medicamentos de dolor de cabeza más rápidamente.
- Un estudio a gran escala, y aún sin publicar presentada en octubre 24, 2011, encontró que los hombres y las mujeres con el mayor consumo de café tienen un riesgo 13% y 18% menor, respectivamente, para desarrollar el carcinoma de células básales (un tipo de cáncer de piel).


Finalmente, como en todo, tomar esta información como referencia y consultar su medico si existen dudas. Incrementar el consumo de café ahora puede ser malo para muchas personas. El secreto es, la moderación.


Adjunto todas las fuentes y estudios que avalan los beneficios del café, si desea investigar podrá buscar para más información:
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13. Rosengren A, Dotevall A, Wilhelmsen L, Thelle D, Johansson S. Coffee and incidence of diabetes in Swedish women: a prospective 18-year follow-up study. J Intern Med. 2004 Jan;255(1):89-95.


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65. Natella F, Nardini M, Belelli F, et al. Effect of coffee drinking on platelets: inhibition of aggregation and phenols incorporation. Brit J Nutr. 2008 Dec;100(6):1276-82.


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