The Low Down On Caffiene Essay Research — страница 2

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incorporates caffeine into its solution. In a 12-ounce glass of carbonated cola beverage, there is about 40 mg of caffeine (Britannica 1999). Caffeine is present in many of our beverages and foods. People probably drink a lot more than they realize. According to the National Soft Drink Association, the following is the caffeine content in mgs per 12 oz can of soda (Caffeine Consumed Miller): 1. Afri-Cola 100.0 (?) 2. Jolt 71.2 3. Sugar-Free Mr. Pibb 58.8 4. Mountain Dew 55.0 (no caffeine in Canada) 5. Diet Mountain Dew 55.0 6. Kick citrus 54 (36mg per 8oz can, caffeine from guarana) 7. Mello Yellow 52.8 8. Surge 51.0 9. Tab 46.8 10. Battery energy drink — 140mg/l = 46.7mg/can 11. Coca-Cola 45.6 12. Diet Cola 45.6 13. Shasta Cola 44.4 14. Shasta Cherry Cola 44.4 15. Shasta Diet

Cola 44.4 16. Mr. Pibb 40.8 17. OK Soda 40.5 18. Dr. Pepper 39.6 19. Pepsi Cola 37.2 20. Aspen 36.0 21. Diet Pepsi 35.4 22. RC Cola 36.0 23. Diet RC 36.0 24. Diet Rite 36.0 25. Canada Dry Cola 30.0 26. Canada Dry Diet Cola 1.2 27. 7 Up 0 By means of comparison, a 7 oz cup of coffee has the following caffeine (mg) amounts, according to Bunker and McWilliams in J. Am. Diet. 74:28-32, 1979(Caffeine Consumed Miller): 1. Drip 115-175 2. Espresso 100mg of caffeine 3. 1 serving (1.5-2oz) 4. 5. Brewed 80-135 6. Instant 65-100 7. Decaf, brewed 3-4 8. Decaf, instant 2-3 9. Tea, iced (12 ozs.) 70 10. Tea, brewed, imported 60 11. Tea, brewed, U.S. 40 12. Tea, instant 30 13. Mate 25-150mg Other data on caffeine: 1. Cup of coffee 90-150mg 2. Instant coffee 60-80mg 3. Tea 30-70mg 4. Mate

25-150mg 5. Cola 30-45mg 6. Chocolate bar 30mg 7. Stay-awake pill 100mg 8. Vivarin 200mg 9. Cold relief tablet 30mg Caffeine is absorbed very quickly from the gastrointestinal tract and then distributed in the various body tissues. After absorption, it passes into the central nervous system. “Caffeine sensitivity” refers to the amount of caffeine that will produce negative side effects. This amount will vary from person to person. Caffeine does not accumulate in the bloodstream nor is it stored in the body. It is excreted in the urine many hours after it has been consumed (Caffeine Blues Cherniske). Caffeine may be used as a treatment for migraine headaches and in relieving, for a short time, fatigue or drowsiness. Caffeine may be used for medicinal reasons. Caffeine is a

pharmaceutical drug. It helps blood flow to the brain in a more fluid fashion and helps prevent migraines (article 1). It improves motor performance, decreases fatigue, enhances sensory activity, and increases alertness (Britannica 1999). It also has been thought to improve endurance exercise (Endur. Powers). Caffeine will not reduce the effects of alcohol, although many people still believe a cup of coffee will “sober up” an intoxicated person (Chronic Temples). Caffeine has become very popular because of these reasons. However, there is a down side to this drug. Caffeine intake may also produce irritability, nervousness or anxiety, jitteriness, headaches, and insomnia (Britannica 1999). Excessive caffeine intake can lead to a fast heart rate, dieresis (excessive excretion

of fluids), nausea and vomiting, restlessness, anxiety, depression, tremors, and difficulty sleeping (Kids Walmer). The effect of caffeine on health has been widely studied. In particular, the effects of caffeine on fibrocystic breast disease, cardiovascular disease, birth defects, reproductive function, and behavior in children have been closely examined. A 1984 statement from the American Medical Association Council on Scientific Affairs stated, “Moderate tea or coffee drinkers probably have no concern for their health relative to their caffeine consumption provided other lifestyle habits (diet, alcohol consumption) are moderate as well.”(Chronic Temples). This statement puts caffeine use in perspective. Caffeine increases the level of circulating fatty acids. This has been

shown to increase the oxidation of these fuels, hence enhancing fat oxidation. Caffeine has been used for years by runners and endurance people to enhance fatty acid metabolism (Endur Powers). It’s particularly effective in those who are not habitual users. It does affect metabolism, though it is a good question whether its use truly makes any difference during a diet. The questionable rationale for its original inclusion in diet pills was to make a poor man’s amphetamine-like preparation from the non-stimulant sympathomimetic phenylpropanolamine and the stimulant caffeine. (That you end up with something very non-amphetamine like is neither here nor there.) The combination drugs were called “Dexatrim” or Dexa-whosis (as in Dexedrine) for a reason, namely, to assert its