Topics: Caffeine, Coffee, Tea Pages: 5 (1461 words) Published: October 9, 2013
Chapter II
 This chapter presents both foreign and local related literatures relevant to the study. This relevance is shown by the proponents in order to give more reason and understanding of the proposition. Related Literature and Studies

Downsides in Caffeine
New research from John Hopkins Medical School shows that performance increases due to caffeine intake are the result of caffeine drinkers experiencing a short-term reversal of caffeine withdrawal. In essence, coming off caffeine reduces your cognitive performance and has a negative impact on your mood.

Drinking caffeine triggers the release of adrenaline. When caffeine puts your brains and body into this hyper-aroused state, your emotions overrun your behavior. The negative effects of a caffeine-generated adrenaline surge are not just behavioral. Researchers at Carnegie Mellon University found that large doses of caffeine raise blood pressure, stimulate the heart, and produce rapid shallow breathing, which readers of Emotional Intelligence2.0 know deprives the brain of oxygen needed to keep your thinking calm & rational.

For you to wake up feeling rested your brain needs to move through an elaborate series of cycles. You can help this process along and improve the quality of your sleep by reducing your caffeine intake.

Caffeine has a six-hour half-life, which means it takes a full 24 hours to work its way out of your system. Have a cup of joe at 8 A.M. and you will still have 25% of caffeine in your body at 8 p.m. Anything you drink in the afternoon will still be at 50& strength at bedtime. Any caffeine in your bloodstream –- with the negative effects increasing with the dose – makes it harder to fall asleep. Withdrawal from Caffeine

The caffeine withdrawal syndrome has been well-characterized in numerous rigorous double-blind studies. The potential for caffeine withdrawal to cause clinically significant distress or impairment in functioning is reflected by the inclusion of caffeine withdrawal as an official diagnosis in ICD-10 (World Health Organization) and as a proposed diagnosis in DSM-IVC (American Psychiatric Association). There is also evidence that children experience withdrawal effects during caffeine abstinence.

Signs and symptoms include headache, fatigue, sleepiness/drowsiness, difficulty in concentrating, work difficulty, irritability, depression, anxiety, flu-like symptoms, and impairment in psychomotor, vigilance and cognitive performances.

In healthy & normal caffeine consumers who abstain for 24 hours indicate that the incidence of withdrawal headache is about 50%. The caffeine withdrawal syndrome follows an orderly time course. Onset usually occurs 12 to 24 hours after terminating caffeine intake, although onset as late as 36 hours has been documented. Peek withdrawal intensity has generally been described as occurring 20 to 48 hours after abstinence. The duration of withdrawal has most often been described as ranging between 2 days & 1 week, although longer durations have been occasionally noted. Health Benefits of Drinking Tea

Boosts the immune system. Green tea boosts the number of “regulatory T cells” in the body, which are important for the immune system, according to research from the Linus Pauling Institute at Oregon State University.

Rehydrates. “Studies on caffeine have found very high doses dehydrated and everyone assumes that caffeine-containing beverages dehydrate. But even if you had a really strong cup of tea or coffee which is quite hard to make, you would still have a net gain of fluid’, study researcher Carrie Ruxton of Kings College London, told BBC news.

May Lower Risk of Heart Disease. The University of Maryland Medical Center also found that research has shown that green tea and black ttea have atherosclerosis-preventing effects, although FDA has yet to allow tea makers to claim that green tea affect heart disease risk.

Could shrink tumors. Scottish researchers found that...
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