According to WebMD, caffeine can stay in your system for up to eight hours, so the best time, if any, to consume caffeine is in the morning. Caffeine comes from a number of sources with the most popular sources being the: coffee bean, cocoa bean, kola nut and the tea leaf. Caffeine, in humans, acts as a central nervous system stimulant and is one of the worlds most commonly used psychoactive drugs. The sleep of each participant was recorded over 15 non-consecutive days by using electrodes which measured the muscle tone and any eye-movement. The amount of wakefulness and sleepiness (stage 1 of sleep) averaged 64 minutes of drowsiness when not drinking before bed. As for stages 3 and 4 of sleep (slow wave sleep) a decrease was found in the duration of these stages when caffeine was consumed dropping from 66 and 61 minutes (no drinking and decaf coffee) to 38 minutes.
The reason this study was conducted was to see if caffeine did really affect how a person slept, if consumed close to bedtime.
According to WebMD the common saying of caffeine is likely to cause insomnia is just a myth if accounted for correctly.
Swap for decaf coffee - the results of the study mentioned in this article show that decaffeinated coffee has a significantly small difference on affecting your sleep. Stay hydrated with water - for years doctors have warned patients to not drink caffeine before physical activity or bed as it causes the body to produce more urine but as reported in the San Francisco Chronicle, studies have been shown that caffeine causes nearly around the same urine output as other liquids like water and soft drinks.

The body is telling you that you need sleep but your mind is telling you that you that you have lots to do.
Some people generally like the taste of a strong cup of coffee whereas others consume caffeine for a more common reason of increasing their alertness and avoiding daytime drowsiness. People who take caffeine in the evening may find it difficult to sleep that night and could potentially result in unpleasant withdrawal symptoms. Where caffeine originated from is a debatable topic between countries but one of the more prominent tales which has been passed on through generations, comes from Ethiopia. Apart from the popular forms mentioned above, caffeine is also found in foods such as chocolate, ice-cream and believe it or not decaffeinated coffee.
5 of the days consisted of no drinking before bed, 5 days drinking decaffeinated coffee and the remaining 5 days consisted of decaffeinated coffee containing a caffeine alkaloid base (300mg). When the decaffeinated coffee was consumed the duration of sleep decreased ever so slightly to 7 hours and 47 minutes, however when the caffeine induced decaffeinated coffee was consumed the hours of sleep dropped to a merely 5 hours and 50 minutes. A slight change to 66 minutes when drinking decaffeinated coffee and for the caffeine induced decaf coffee the duration of drowsiness jumped to a staggering 140 minutes. As the results show, we can see that caffeine affects our sleep quite dramatically which may explain the reason to why people that consume coffee close to bedtime, wake up feeling tired and groggy. However caffeine can cause headaches and dizziness periods which are symptoms of dehydration, whereas water has many benefits; it keeps you hydrated, fights infections, clears your skin, keeps your concentration levels up and can help with weight loss.

Caffeine is usually consumed in a drinks form such as: coffee, teas (including green tea), soft drinks and energy drinks. The folk story begins when a farmer moved his goats to a new grazing area and he noticed that they were restless and seemed nervous. As for the amount of awakenings, once again the caffeine induced coffee caused 11 awakenings compared to the no drinking and decaf coffee awakenings of 7 times. It takes an average of 5 to 7 hours for your body to dispose of half of the caffeine consumed then after 8 to 10 hours, 75% of the caffeine is gone. He observed his goats over the next couple of days and saw they were grazing on small red berries. For the majority of people who drink coffee, a cup or two in the morning shouldn’t interfere with their sleep that evening however as the study above has found, consuming coffee later in the day can interfere with your sleep. Some people are more sensitive to caffeine than others with just one cup of coffee prompting unwanted side affects such as impatience and sleeping problems, also people who are caffeine sensitive may feel really nervous and start to have the shakes when the caffeine is passing through the body.

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