Caffeine may be beneficial for health in some situations and harmful in others, so it is important that each person should know whether or not to reduce the consumption of coffee. Caffeine stimulates the central nervous system, improves the level of attention and concentration, alleviate fatigue and improves physical performance. For most of the healthy adults, moderate dose of caffeine (200-300 mg or 3-4 cups of coffee per day) is not contraindicated. However in some cases the amount of caffeine can be minimized or even giving up completely.
Too much caffeine can have unpleasant effects, if used every day more then 500-600 mg may cause
- Gastrointestinal disorders
- Quick emotion
- Muscle tremors
When does a low caffeine consume causes nervousness?
Some people are more sensitive to caffeine then others. This sensitivity is manifested even after consumption of a small amount of caffeine (only one cup of coffee or tea), which may cause unwanted effects such us sleep disturbance, restlessness, irritability. Response to caffeine is particularly influenced by how much caffeine a person consumes. Those who do not drink coffee regularly, tend to be more sensitive to its harmful effects. Other factors may include body mass, age, administration of drugs, various health problem (such as anxiety disorders). Research suggests that men should be more sensitive to the effects of caffeine than women.
When a person can not get enough sleep
Most adults need seven to eight hours of sleep every night, but caffeine may interfere with this much needed sleep. Chronic fatigue, whether it is the result of following trip, stressful situation or working conditions, lead to sleep deprivation. Cumulative lack of sleep disrupt the performance needed for daily activities, quality of attention, etc.
Using caffeine to compensate the lack of sleep can create an undesirable cycle. For example, it takes three coffee for a person to remain awake during the day. However, caffeine can prevent a person to sleep or shortens the period in which a person needs to rest at night.
When a person uses certain drugs and herbal supplements
Certain medications as well as herbal supplements can interact with caffeine. Here are some examples:
- Some antibiotics like ciprofloxacin and norfloxacin can interfere with the absorption (decay) of caffeine. Thus, it can increase the length of time caffeine stays in the body and amplify its unwanted effects
- Theophylline a bronchodilator that contributes to dilatation of the airways by relaxing the surrounding muscle. If it used with food or drinks containing caffeine, theophylline concentration in the blood will increase. This may cause side effects such as nausea, vomiting and heart palpitations
- Echinacea this herbal supplement that is used to prevent colds or other infections may increase the blood concentration of caffeine and may enhance the unpleasant effects of caffeine.