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What Is The Effect Of Caffeine?

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What Is The Effect Of Caffeine?

Postby Steffon » Sat Aug 19, 2017 12:42 am

Caffeine is best known for its stimulant, or "wake-up," effect. Once a person consumes caffeine, it is readily absorbed by the body and carried around in the bloodstream, where its level peaks about one hour after consumption. Caffeine mildly stimulates the nervous and cardiovascular systems. It affects the brain and results in elevated mood, decreased fatigue, and increased attentiveness, so a person can think more clearly and work harder. It also increases the heart rate, blood flow, respiratory rate, and metabolic rate for several hours. When taken before bedtime, caffeine can interfere with getting to sleep or staying asleep.

Exactly how caffeine will affect an individual, and for how long, depends on many factors, including the amount of caffeine ingested, whether one is male or female, one's height and weight, one's age, and whether one is pregnant or smokes. Caffeine is converted by the liver into substances that are excreted in the urine.

Some people are more sensitive to the effects of caffeine than others. With frequent use, tolerance to many of the effects of caffeine will develop. At doses of 600 milligrams (about six cups of coffee) or more daily, caffeine can cause nervousness, sweating, tenseness, upset stomach, anxiety, and insomnia. It can also prevent clear thinking and increase the side effects of certain medications. This level of caffeine intake represents a significant health risk.

Caffeine can be mildly addictive. Even when moderate amounts of caffeine are withdrawn for 18 to 24 hours, one may feel symptoms such as headache, fatigue, irritability, depression, and poor concentration. The symptoms peak within 24 to 48 hours and progressively decrease over the course of a week. To minimize withdrawal symptoms, experts recommend reducing caffeine intake gradually.

Current research on how caffeine affects a variety of health issues is summarized below. Keep in mind that most experts agree that moderate use of caffeine is not likely to cause any health problems.

Studies have looked at the effects of caffeine on heart health. Moderate caffeine consumption does not appear to adversely affect cardiovascular health.

Caffeine appears to increase the excretion of calcium, a mineral needed for healthy bones. Calcium is particularly important to prevent osteoporosis, a bone disease characterized by loss of bone strength and seen especially in older women (although men get it too). Moderate caffeine intake does not seem to cause a problem with calcium, as long as one is consuming the recommended amount (adult men and women should be taking between 1,000 and 1,200 milligrams of calcium, depending on age and gender).

In the past there have been concerns that the caffeine in coffee may cause cancer. Research has shown that caffeine in coffee does not cause breast or intestinal cancer. However, not enough research has been done to determine if caffeine in coffee is involved in urinary bladder or pancreatic cancer. Taken in moderation, it is unlikely that caffeine will cause cancer.

Evidence suggests that, at levels over 500 milligrams per day, caffeine may delay conception. Moderate caffeine consumption does not appear to be of concern to women trying to get pregnant. Moderate consumption is also important for a healthy pregnancy. Excessive caffeine intake has been associated with miscarriages and low birth weight babies.

Because children have developing nervous systems, it is important to moderate their caffeine consumption. For children, major sources of caffeine include soft drinks and chocolate.

Caffeine may be useful as part of a weight control program because it increases the rate at which the body burns calories for three or more hours after being consumed.

Caffeine's ability to improve physical performance is well known among well-trained athletes. Through a mechanism that is not completely understood, caffeine seems to increase endurance and speed in some situations. Excessive use of caffeine is restricted in international competitions
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What Is The Effect Of Caffeine?

Postby Lorenz » Sat Aug 19, 2017 12:43 am

you need caffeine to get you going!!... too much of it CAN hurt though...coke and coffee stain your teeth... so brush brush brush!! and drink lots of water.. cause your liver needs it!
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What Is The Effect Of Caffeine?

Postby Celestine » Sat Aug 19, 2017 12:49 am

Yes, it's bad for you....Usually, the effect is nervousnes..You tend to get nervous with no particular reasons. You feel restless and troubled, but you don't know what's causing it. I've tried that several times before. I kept on wondering why I felt that way. Later on, I figured out that I was drinking to much coffee, like a cup every night (one time I drank two cups, and yeah, it did cause a drastic effect on me). So, I stopped drinking it. I'm fine now^_^

Anyway, it's alright to drink coffee, but not too much.
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What Is The Effect Of Caffeine?

Postby Cristofor » Sat Aug 19, 2017 12:52 am

I have heard that caffeine while it keeps u awake, suppresses serotonin and hence the 'wellness' feeling to some extent...I have seen that caffeine test on spiders video...'the spider on caffeine start building its web with great gusto but its web is highly distorted and ineffective' .... i think the spider loses the bigger picture...caffeine I guess might help u do repetitive tasks well when otherwise u can't but it is a crutch...I depend on my body to do the work and my mind and motivation to be the 'caffeine' to do the work..not an external stimulant like coffee. I drink tea from time to time but only rarely and only when I am fatigued. Hope my opinion helps.
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What Is The Effect Of Caffeine?

Postby Paulsen » Sat Aug 19, 2017 1:00 am


Reduces boredom

Decreases depression

Increased alertness when tired

Willingness to consider alternative theories

Increases physical stamina and reduces perceived exertion

May attenuate the response-slowing effect of alcohol

Increases performance on boring, repetitive tasks


Research has failed to show improved memory or improvement in complex cognitive tasks


Increases anxiety and nervousness at high doses or in sensitive individuals

Insomnia, decreased ability to sleep

Caffeine withdrawal can worsen mood

Caffeine withdrawal causes headaches, flu-like symptoms, feelings of lethargy and reduces motivation

Increases jaw tension and bruxism



So as anything in life it has good, neutral and/or bad causes.
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What Is The Effect Of Caffeine?

Postby Joachim » Sat Aug 19, 2017 1:09 am

It takes a toll on the adrenal glands, so if you're prone to anxiety, it's something to consider.
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What Is The Effect Of Caffeine?

Postby Jarin » Sat Aug 19, 2017 1:12 am

Caffeine's strongest effects are felt for about an hour after taking it, but some effects usually last 4 to 6 hours. Caffeine causes increased neuron firing in the brain which the pituitary gland perceives as an emergency and therefore causes the adrenal glands to release adrenaline. Caffeine also increases dopamine levels -- the neurotransmitter that is affected by drugs like amphetamines and heroin. Obviously, it does this on a much reduced level from those drugs, but this may be the source of caffeine's addictive quality.

While caffeine is mildly addictive, it has not been shown to have a direct link with any serious health risks. Still, anyone who's been up all night after drinking too much coffee can tell you that caffeine can affect a person's mood and sleep pattern. Here are some of the frequent effects of caffeine:

Caffeine is a diuretic. Caffeine prompts the body to lose water through urination. This can lead to dehydration and is the reason that caffeinated drinks are not a good idea when working out or doing other activities that require fluids. In fact, it is suggested that you add 8 ounces of water for every cup of coffee you drink.

Caffeine can cause you to feel jittery, skittish, restless, excitable or anxious. It can temporarily speed the heart rate. If you're feeling stressed out, then a cup of coffee can exacerbate, rather than help, this feeling. Too much caffeine can hurt a person's ability to concentrate, making it difficult to study.

Caffeine can cause insomnia. It can be very hard to fall asleep when you take a lot of caffeine. This is especially true if you take it at night, but is also true of higher doses earlier in the day.

Caffeine at high doses can cause headaches.

Some caffeinated beverages can have other health effects. For instance, the acid in coffee can upset the stomach, and coffee (though not the caffeine in it) can worsen ulcers, raise blood pressure and blood cholesterol, and speed up the heart rate, increasing the risk of heart disease.

Caffeine can have negative effects on pregnant women or on women who would like to become pregnant including an increased risk for difficult conception and miscarriage. Caffeine is transmitted through the placenta and through breast milk to the baby. Therefore, if you're pregnant or thinking about becoming pregnant, the FDA recommends that you stop taking caffeine or cut back to 1 cup per day.

How much caffeine am I having?

In the U.S., the average person drinks 200 milligrams a day (about two 8 ounce cups of coffee). Check out the list below to see how much you're having.

Beverage/Food Serving Size Average Amt. (mg) Range (mg)

Brewed Coffee 8 ounce 85 65-120

Instant Coffee 8 ounce 75 60-85

Decaf, Brewed 8 ounce 3 2-4

Decaf, Instant 8 ounce 3 1-4

Espresso Single 2 ounce 80 60-100

Cappuchino/Latte 2 ounce 80 60-100

Moccachino 2 ounce 90 70-110

Black Tea 8 ounce 40 30-60

Decaf Black Tea 8 ounce 4
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What Is The Effect Of Caffeine?

Postby Heathclyf » Sat Aug 19, 2017 1:27 am

it makes you hyper

it makes it impossible for you to sleep
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What Is The Effect Of Caffeine?

Postby Edwin » Sat Aug 19, 2017 1:34 am

a couple sodas or coffee is not bad if you limit them to a couple a day, if you consume too much caffine it can cause heart palpitations, cause your pulse rate to soar, make your blood pressure soar and cause panic or anxiety attacks.
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What Is The Effect Of Caffeine?

Postby Valentin » Sat Aug 19, 2017 1:38 am


side effects from excessive caffeine consumption are diarrhea, copious urination, while some people can even experience facial flushing. It's hard to say how much caffeine is needed to trigger these side effects because everybody's body will react differently.

Occasional drinkers might experience the side effects after one cup whereas usual drinkers might get jumpy when drinking one more than usual.

Caffeine creates a dependency, and its main problem is caffeine withdrawal. This means that if someone who usually drinks between one and three cups of coffee a day suddenly stops drinking it, that person could develop headaches.

Other major drawbacks of quitting the brew are anxiety, light depression and fatigue. Obviously these might seem like very severe side effects but only a minority of coffee drinkers will experience them.
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