Coffee originally came from the mountain forests of Ethiopia and is now cultivated in many tropical countries. The tree can grow to eight meters high and it thrives best in regions that are about 15–24°C (59–75.2°F) warm, preferably in volcanic soil. The fruit, whose dried seeds are later roasted to become the fragrant coffee bean, transforms its green colour via yellow to a deep red.
Due to caffeine, coffee has a stimulating effect on the heart and circulation, in contrast to the vascular smooth muscles in the bronchia, where caffeine has a relaxing effect.
An exception is the effect in the brain, where caffeine has a vasoconstrictive influence. Coffee is a diuretic. Too much consumption can cause sleeping problems, heart palpitations, stomach irritations and abdominal cramping.
Indications and application