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Caffeinated drinks
Many popular drinks contain the stimulant caffeine. It has a bad reputation, but what effects does it really have and does it bring any Effects of caffeine
Caffeine acts as a stimulant to the heart and central nervous system, and is also known to increase blood pressure in the short term, although there's no conclusive evidence of long-term effects on blood pressure. The effects on blood pressure are most likely when caffeine is taken in excessive quantities or by people who are highly sensitive to it. People who are hypertensive (have habitual high blood pressure) are advised to avoid caffeinated drinks, andshould limit their intake of
Caffeine content
Caffeine and weight loss
Caffeine has been shown to have very modest effects on increasing metabolism, and is sometimes added as an ingredient to weight loss pills. These pills often make claims about speeding metabolism to 'effortlessly melt' excess fat, but in reality the amount of calories that slimming pills containing caffeine would actually burn is very small. Caffeine may also suppress appetite, but without making other changes to your diet and lifestyle caffeine is unlikely to make a significant difference to your weight. Coffee has been linked with a number of the risk factors for coronary heart disease, including increased blood pressure and raised blood cholesterol levels. But no relationship has been found between drinking coffee and the likelihood of developing coronary heart disease. Coffee may be beneficial in some areas of health - for example, research has found it may reduce the risk of developing gallstones and kidney It's difficult to suggest a safe limit for coffee intake because of the huge variation in caffeine content across different brands and an individual's sensitivity to the drug. People with high blood pressure and pregnant women are advised to limit their caffeine consumption. For the rest of the population, there's no evidence coffee does any long-term harm. Caffeine does have a very mild diuretic effect but, drunk in moderation, you don’t need to increase fluid intake to any significant degree as the loss of fluid is very minimal. Tea contains some useful minerals such as zinc, manganese and potassium, and scientists are researching its potential to reduce the risk of coronary heart disease and some cancers. Tea contains antioxidant substances called flavonoids, which have been shown to help slow or inhibit the chemical reactions thought to take place during the development of coronary heart disease. Green tea
There's also a lot of interest in the health benefits of green tea, particularly in relation to cardiovascular health. Again, this is due to flavonoids, which are powerful antioxidants found in high concentrations in both green and black teas. The concentration of these compounds depends on how long the tea has been brewed, but can range from Some studies have compared the concentration of these antioxidant compounds to that found in fruit and vegetables. Flavonoids bring potential benefits to heart health, as well as possible reductions in the risk of Alzheimer’s disease and other neurodegenerative conditions. Caffeine and iron absorption
Both tea and coffee contain polyphenols that can bind to iron, making it difficult for our bodies to absorb. Avoiding tea and coffee during and around mealtimes is important for people at risk of. This article was last medically reviewed by the MRC Human Nutrition Research in July 2008. First published in March 2001. Available online at: http://www.bbc.co.uk/health/healthy_living/nutrition/healthy_caff.shtml

Source: http://skills.library.leeds.ac.uk/lecturer/reading/workshops/takingnotes/caffeine_article.pdf

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PRESENTACIÓN Ponemos a disposición de los lectores la edición de la ALERTA PERIODISTICA correspondiente a agosto de 2010. Como es sabido, se trata de una recopilación de las principales informaciones de carácter económico divulgadas por la prensa nacional durante el mes anterior. En este caso, un rápido vistazo al contenido nos dice que los principales tópicos que constituyeron not

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