8 facts about our everyday drinks

Having coffee or tea on a morning, noon, evening - all day long... It's something like very common lifestyle. Lets see on some facts about our everyday drinks and its main ingredient - caffeine.

1. In general one serving of coffee ranges from about 40 milligrams of the caffeine for a single shot (30 milliliters) of arabica-variety espresso to about 100 milligrams for strong drip coffee.
2. Generally, dark-roast coffee has less caffeine than lighter roasts because the roasting process reduces the bean's caffeine content. Arabica coffee normally contains less caffeine than the robusta variety.
3. Tea usually contains about half as much caffeine per serving as coffee, depending on the strength of the brew.
4. Teas like the green Japanese gyokuro, for example, contain far more caffeine than much darker teas like lapsang souchong, which has very little.
5. Caffeine is completely absorbed by the stomach and small intestine within 45 minutes of ingestion. So it takes less than an hour for caffeine to begin affecting the body and a mild dose wears off in three to four hours.
6. While relatively safe for humans, caffeine is considerably more toxic to some other animals such as dogs, horses and parrots due to a much poorer ability to metabolize this compound.
7. Caffeine is a drug that in large amounts, especially over an extended period of time, can lead to a condition termed "caffeinism."
8. An acute overdose of caffeine, usually in excess of 250 milligrams (more than 2-3 cups of brewed coffee), can result in a state of central nervous system overstimulation called caffeine intoxication.