РефератыИностранный языкCaCaffeine Essay Research Paper Caffeine Caffeine

Caffeine Essay Research Paper Caffeine Caffeine

Caffeine Essay, Research Paper


Caffeine


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Caffeine is the most widely used drug in the


world. It is an effective stimulant of the central


nervous system and in large amounts can produce


undesirable side effects such as: nervousness, insomnia,


rapid and irregular heartbeats, elevated blood sugar


and cholesterol levels, excess stomach acid, and


heartburn. Based on our incomplete knowledge of side


reactions to caffeine, prudent use seems desirable for


all consumers, male and female. The problem is


particularly significant for children because the


effects of caffeine are related to the body weight of


the consumer.


Coffee, tea, chocolate and many soft drinks


contain caffeine, and it is used to flavor certain


foods. It is also found in medications for staying


awake, dieting, treating colds, allergies, migraines and


muscle tension.


Caffeine stimulates the central nervous system.


Its effects range from mild alertness to heightened


anxiety and body tension. Caffeine may not improve


performance of complex tasks; it may even interfere


with work. It shortens reaction time among some users,


but its impact on creativity and other intellectual


activities is hard to define.


Caffeine can be habit-forming. Some regular users


who give it up may experience withdrawal symptoms


twelve to sixteen hours after the last dose, such as:


drowsiness, headaches, lethargy, irritability, disinterest


in work, depression, occasional nausea and vomiting.


How caffeine affects you depends on what and


how much you drink. Strongly brewed coffee or tea


has much more caffeine than a weakly brewed drink.


Age and size make a difference too: A caffeinated soft


drink consumed by a child can have the same effect as


four cups of coffee for an adult. In moderate doses


(more than 200mg, depending on body weight and


physical condition) it can produce trembling,


nervousness, chronic muscle tension, irritability,


throbbing headaches, disorientation, sluggishness,


depression and insomnia – otherwise known as <

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“Coffee nerves”


As with other drugs, how much and how often


caffeine is used can affect reactions. While it may keep


you awake for some tasks, caffeine (and oter


stimulants such as amphetamines or “speed”) will not


make up for declining performance caused by lack of


rest and exhaustion. You may stay awake for an “all-


nighter,” but your memory may be less efficient. In


addition, coffee nerves can cause behaviors that may


annoy others and add tension to interpersonal


interactions.


There are also a number of health risks that can


be linked to extensive use of caffeinated products due


to the affect of caffeine on the nerves and impulses


to the brain. Caffeine may affect coordination, sleep


paterns and behavior. Delayed sleep, frequent night


time awakenings, poor sleep quality or tension-


nervousness cycles may result from excessive caffeine


intake.


People with high blood pressure (hypertension)


should consult their physician before using caffeine.


Limited research links heavy coffee drinking with heart


attacks. Caffeine can produce heart rhythm problems,


a temporary rise of blood pressure and those subject


to irregular heartbeats should avoid caffeine.


Coffee and Smoking, although frequent, are a very


unhealthy combination. Because nicotine raises blood


pressure, cigarette smoking increases the risk of


cardiovascular complications for anyone with high


blood pressure. A typical smoker experiences at least


eight hours a day of nicotine-elevated blood pressure.


Caffeine can worsen this situation. In addition to


blood pressure problems, it can also increase stomach


acid production.


Caffeine has been a part of the typical daily diet


for thousands of years, and will continue to be


probably until the end of time. However it is clear that


excessive use of caffeine, as well as any other drug


can have extremely strong setbacks in a persons and


health and well being, but with moderate use it can


relieve migraines, tension and and other common


illnesses.


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