1) Caffeine acts a stimulant to the nervous system, therefore it can make you feel more awake, help you think faster and more clearly and improve your co-ordination.
2) 120,000 tonnes of caffeine is
consumed around the world every year.
3) Finland is the most caffeinated country in the world, where the average adult consumes 400mg or about four cups of coffee a day – that’s our recommended maximum daily limit according to the
UK Food Standards Agency.
4) 93% of people at work in the UK drink at least one drink with caffeine in it a day.
5) A cup of instant coffee can contain about 100mg of caffeine while a cup of filtered coffee can contain about 140mg.
6) The average mug of tea can contain about 75mg of caffeine.
7) Even though tea contains more caffeine than coffee by dry weight, tea is usually brewed much weaker than coffee so a cup of tea contains less caffeine than a cup of coffee.
8) Some decaffeinated coffee does, despite what it says on the tin, contain caffeine. One study discovered that some brands of decaf coffee contained about
10mg of caffeine per cup.
9) A cup of green tea can contain about
25mg of caffeine, depending on the brand and how it’s brewed.
10) Cocoa has about 20mg of caffeine in an average cup.
11) Chocolate made from cocoa beans contains a
small amount of caffeine. A typical 50g bar of milk chocolate can contain about 25mg of caffeine. A 50g bar of plain chocolate can contain up to 50mg of caffeine.
12) Caffeine is present in some fizzy drinks and energy drinks such as cola (40mg a can) and Red Bull (80mg a can).
13) Caffeine can be a weak diuretic (although this varies from person to person) – meaning that it could make you go to pee more, which can lead to mild dehydration. Caffeine’s diuretic effects seem to be less with those who drink lots of it.
14) If you drink lots of caffeine then be sure to help counteract any negative effects by also drinking plenty of water.
15) Drinking up to about three or four cups of instant coffee or a couple of cups of filtered coffee in a day (depending on how strong they are) shouldn’t cause most healthy adults any harm, but some people are more sensitive to caffeine than others. Caffeine can cause a slight, temporary rise in heart rate and blood pressure and large doses (over three or four cups of coffee) can increase your stress levels and cause lapses in concentration.
16) On average, it takes about four to five hours for your body to eliminate 50% of the caffeine you consume. 75% of the caffeine will be gone after about eight to ten hours.
http://virginpure.com/31-things-you-need-to-know-about-caffeine/