Coffee is the world’s most widely consumed stimulant whose effect on health is regularly discussed controversially. Caffeine, the most responsible for the stimulating effect of the aromatic drink and attributed to both harmful and protective factors.
Coffee is made from the beans of the coffee shrub native to Africa. It contains the psychoactive caffeine and many other substances. Thus, we find in with frowned upon as unhealthy stimulants all-purpose drink. But also important for protection against free radicals antioxidants are present. The actual main active ingredient, caffeine, stimulates the entire cycle. It is slow down the neurotransmitter adenosine, which protects cells from over-activation. About half an hour after consuming of caffeine they are become occupied and reserved for the adenosine receptors. So this cannot exert a calming effect. As a result, the production of stimulatory neurotransmitters dopamine and epinephrine is no longer braked. This explains the activating effect of caffeine. The central nervous system is stimulated, the concentration improves, and heart and bowel movements accelerate.
Coffee as a health elixir?
For a long time it was assumed that coffee dries the body. This thesis is untenable according to current research. Caffeine does have a weak diuretic effect, tissue extracts, however, no water. However, has been seen a negative effect on the sleep stages. Who at evenings drinking coffee, risks losing a restful sleep. Increasing the pulse frequency by consuming large amounts of coffee for people with heart disease is not harmless. Responsible for the development of cardiovascular disease, however, but small dosage not seem to be. As is so often the dose turn in to the poison. An overdose of caffeine can cause nervousness, anxiety and cardiac arrhythmias cause for sensitive people. Pregnant women should limit their consumption of coffee strong, as it stimulus is suspected to slow the growth of the fetus.