Coffee
Black? White? With sugar or without? Instant or brewed using a filter machine? There are many ways to prepare a cup of coffee and drink it. And often that coffee will be enjoyed in takeaway form on a long journey, appreciated not just for its taste but also its most widely familiar ingredient: caffeine. Considered a drug in pharmacological and medical terms, caffeine stimulates the nervous system and fuels the re- lease of adrenalin and cortisol. These stress hormones narrow the blood vessels and lead to an increase in blood pressure, while at the same time oxygen supply to the cells is boosted. The stimulating effect can take effect around 15 minutes after consuming the caffeine and last for several hours. Nutritionists largely agree that up to five cups of coffee a day should not cause a problem: coffee aficionados everywhere will drink to that!
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