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CAFFEINE is a substance that occurs in coffee grains (about 1-2.8 percent), tea leaves (teina is called, about 2-3.5 percent), cola nuts (up to 3.5 percent), cocoa beans and guarana. The effect of caffeine is that it stimulates the central nervous system, affecting concentration, reflexes and elevate mood. In addition, caffeine accelerates heart function, increases the strength of its contraction and increases the rate of metabolism. It also narrows the cerebral vessels, helping to alleviate migraine.
CAFFEINE has stimulatory properties by acting on the cortex. Causes better concentration, prolongs concentration, reduces fatigue and drowsiness. Some studies indicate that it improves logical thinking and memory. However, this is a short-term effect and with the expulsion of caffeine from the body is killed. The average half-life of this compound in the body is 4 hours (each has a different sensitivity to caffeine – faster metabolism, for example, in smokers). Caffeine is a compound used in painkillers because it alleviates pain and tension, and also affects the release of dopamine – the hormone responsible for the feeling of satisfaction. In addition, caffeine can lower the histamine in the body (a compound responsible for allergic reactions). It is also used to treat bronchial asthma because it expands the bronchi.