Stop and Read!!!! Caffeine....
March 6, 2007 8:18am CST
Caffeine is in coffee, tea, soft drinks, chocolate and some nuts. Caffeine stimulates the central nervous system, heart muscle and respiratory system. It has diuretic effects (increased urine) and delays fatigue. A high intake of caffeine at once can cause caffeine-induced mental disorder. The symptoms include restlessness, nervousness, excitement, insomnia, stomach upset, muscle twitching, incoherent speech, heart palpitations and excessive alertness. Expert says the recommends a maximum daily caffeine intake of no more than 2.5 milligrams per kilogram of body weight. Based on average body weights of children, this means a daily caffeine intake of no more than: 45 mg for children aged 4 - 6; 62.5 mg for children aged 7 - 9; and 85 mg for children aged 10 - 12.
7 Mar 07
Drinking coffee increases the secretion of acid into the stomach, but it may be that, in addition to caffeine, other coffee components produce this effect. Although caffeine stimulates acid secretion, it also reduces the peristaltic action of the stomach, the action that causes the emptying of the stomach's contents into the small intestine. Caffeine also slows down the passage of material through the small intestine, yet speeds its passage through the large intestine. As well as these effects on the digestive system, coffee and tea also reduce the body's absorption of specific nutrients, particularly iron, an essential mineral. The specific chemical or chemicals that cause the inhibition of iron uptake are not known, but caffeine and the tannins and other components of tea are the most likely agents. In addition to this, caffeine's ability to increase urination-by 30% for up to three hours following ingestion- can cause significant increases in the excretion in urine of calcium, magnesium, and sodium. Though some tolerance does develop to this effect, it could contribute to a deficiency in these minerals.
6 Mar 07
caffeiene has negative effects in our health, but I didn't know that chocolate also has caffeine,I love coffee and tea and i don't know how to minimize drinking such stuff..anyway thanks because this is useful information.
7 Mar 07
The darker the chocolate, of course, the higher the caffeine content. Caffeine is present in tea leaves and in coffee to the extent of about 4%. Tea also contains two other alkaloids, theobromine and theophylline. According to the National Soft Drink Association,the following is the caffeine content in mgs per 12 oz can of soda: Jolt 71.2 Sugar-Free Mr. Pibb 58.8 Mountain Dew 55.0 (no caffeine in Canada) Diet Mountain Dew 55.0 Coca-Cola 45.6 Diet Cola 45.6 Pepsi Cola 37.2 Diet Pepsi 35.4 a 7 oz cup of coffee has the following caffeine (mg) amounts, according to Bunker and McWilliams in J. Drip 115-175 Espresso 100mg of caffeine 1 serving (1.5-2oz) Brewed 80-135 Instant 65-100 Decaf, brewed 3-4 Decaf, instant 2-3 Tea, iced (12 ozs.) 70 Tea, brewed, imported 60 Tea, brewed, U.S. 40 Tea, instant 30 Mate 25-150mg