Summarising (and translating) an article from Kompas about coffee.

The good things about coffee:
– It stimulates the central nervous system, the respiratory system and the heart. Therefore drinking a normal intake of coffee (1-3 cups) will make us think faster, more focused, more tired and sleepy resistant. However this positive isn’t really applicable to people whose work need neatness, accuracy in counting (and maths), drawing or painting. Drinking coffee brings more benefits to people who work with social studies or work that requires memorizing.
– Caffeine sometimes can be found in medicine for headache. Caffeine can narrow the blood vessell to the brain thus reducing the cause of headache. Xantin (related to Caffeine) in low dose can stimulate a depressed nervous system (from the effect of drugs and alcohol abuse).
– Caffeine in coffee can neutralise fatty acid in blood.

Negative effects:
– It carries an addictive effect to its drinker (can be physchologically or physiologically). Coffee consumsion above 250 mg a day can cause insomnia, tremor(?), stomach upset, irregular heart beat and nervousness.
– It’s dangerous for people with hypertension. It causes blood pressure to rise up quickly.
– Might contribute to infertility in female drinkers. It may also increade the risk of osteophorosis to older women.
– Not good for people with “lambung” problem.
– Not good for people with heart problem (a lengthy explanation is given, but i can’t make sense of it neither can I be bothered to translate it).

So the bottom line is: take control of your coffee intake!