What Caffeine Does to the Body
Caffeine affects the body in a variety of ways. It stimulates the central nervous system, improves mood and creates feelings of alertness, reduced fatigue, boosted endurance and mental activity. It speeds up the heart and constricts the blood vessels. Gastric upset is also common if you consume a lot of caffeine, especially in the form of coffee. Over 100 mg a day is considered a lot and can contribute to insomnia, agitation, headaches and tremors.
Understanding Caffeine Dependance and Addiction
It's fairly easy to become dependent on caffeine. Dependence is basically a very mild addiction to caffeine. This consists of three specific attributes, including developing a tolerance to the substance, a need to intake more to feel the same effects and suffering from withdrawal symptoms when you quit using it. Many people remain dependent on caffeine because it often acts as a cure to its own withdrawal symptoms.
The Withdrawal Process
If you quit taking caffeine cold turkey (without slowly reducing how much you ingest), you'll likely suffer from withdrawal symptoms. The most common symptom of withdrawal is a very bad headache. In fact, these very intense headaches can feel similar to a migraine. This initial headache can last up to 48 hours. Other withdrawal symptoms can last up to a week; these include fatigue, malaise, lethargy, irritability, anxiety, nervousness and tremors.