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Nowadays, caffeine is probably the most sought for psychoactive drug all over the world. A majority of people intake caffeine every single day in various forms. It can be either a cup of coffee or tea or a soft drink. A vast number of people who drink coffee every day cannot imagine their day without the morning cup of coffee.


Most people who drink coffee know that caffeine is a stimulant. When a person consumes caffeine, his or her nervous system will be more alert and a person will no longer feel drowsiness. Doctors even recommend caffeine to patients who suffer from migraine headaches or asthma. Sources
A single cup of coffee has at least 95 mg of caffeine in it but there are some cups that contain 200 mg of caffeine. On the other hand, a cup of tea has between 40 and 120 mg of caffeine while caffeinated soft drinks have no more than 55 mg of caffeine. Even certain medications for the cold have caffeine in them and people who need to overcome the natural drowsiness of being sick purchase them. Weight loss supplements also contain caffeine. Safe levels
Studies have shown that an adult should not consume more than two or three cups of coffee per day, which is around 250 mg of caffeine. However, some people are more sensitive to caffeine so they should consume even less coffee or tea. Myths
All sorts of stories are being told about caffeine. Some say that a person can lose weight by consuming it but none of the studies have yet backed up that claim. Lots of people, students in particular, think that a lot of caffeine will make them better at learning and remembering. A normal dosage of caffeine will better a person's attention and prevent drowsiness. However, if a person intakes too much he or she will feel jittery and will not be able to focus on the learning.


Even though caffeine is safe when consumed in moderate quantities, a person who intakes too much will suffer an overdose. In that case a person will experience nausea and headache. Along with the feeling of jittery, these are only the warning signs. A person who neglects these signs and continues to drink caffeine may end up with caffeine toxicity. Symptoms of such disorder are dizziness, vomiting, hallucinations and irregular heartbeat. A person should go to the hospital if he or she suffers from any of the symptoms.

Caffeine withdrawal symptoms include headache, constipation, runny nose, anxiety, nausea, vomiting, craving, nervousness, insomnia and irritability. Apart from these a person may also suffer from shakiness, cramps, fatigue, drowsiness, dizziness, depression, apathy and inability to concentrate. Out of all these, a throbbing headache is the one that occurs in most cases.

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