Yesterday the subject of my post was 10 Commandments for Bloggers and one of commandments was to write something that can be interesting for many people. As a cup of just prepared coffee was steaming at my table I decided to investigate and share some information about coffee’s impact on our bodies. This should be interesting to a crowd of coffee drinkers I know.
I can’t count how many cups of coffee I’ve consumed in my life but I am pretty sure the number would be quite impressive so it may be better not to count at all.
No matter how it is prepared the essence of the coffee is the caffeine substance:
This substance is well described in this Wikipedia article so I will add here only some extra info.
First of all, caffeine is widespread in nature, there are ~ 60 plants containing caffeine in different amounts. The reason for plants to employ some caffeine is not that they want to stay alert at nights 
, they need it for protection against cerrtain insects. So in the world of plants caffeine is a protective measure, a killing tool.
One of interesting facts is a relationship between smoking and drinking coffee. Smoking decreases the half-life of caffeine in the body. Not surprisingly smokers usually consume much more coffee.
A comparatively minor effect of caffeine is increase of lipolysis rate. For people with excessive weight this may sound like very good thing but the effect is minor in its value.
The primary effect of the caffeine resides in the plane of neurotransmitters and their role in our central nervous system. This mechanism is always a base of any drug impact mechanism.
Caffeine is the adenosine receptors antagonist. What this means in simple language is: in every tissue of a human body there is always some amount of adenosine sensitive receptors. Central nervous system continuously releases some amount of adenosine to regulate certain parameters of your body and those receptors react on this. This is well-tuned mechanism which is knocked out by a cup of coffee.
Caffeine molecules bind to receptors and normal adenosine molecules are no longer able to communicate the message they were released into the blood stream for.
A concrete example: suppose for some reasons your blood pressure has increased. Your brain has detected this and is trying to dilate blood vessels by releasing some adenosine into the bloodstream. But an hour before you have drunk a cup of coffee and half of your receptors are already busy with caffeine molecules So you body needs to produce more adenosine than normally required to reach the needed effect.
This is only a half of the problem. The other side, like with any other drug, is phenomenon of tolerance. A week of moderate coffee consumption can establish almost full tolerance to caffeine. This means that your body adapts to the antagonist effect of caffeine. How it that possible? Very simple: your body develops more adenosine receptors to achieve higher sensitivity.
This could be so-so ok if not well-known drug withdrawal effect: once you stop drinking coffee its adenosine inhibitory effect stops as well and it appears that there are too much adenosine receptors in your body. And again your body needs to adapt by some means because messages communicated by adenosine are taken “too seriously” this time
The conclusion is trivia: be careful with coffee. The logic tells to stop drinking it at all but coffee is deeply rooted in culture, society, customs, etc. so it’s not that easy to be pragmatic here.
Every person chooses the health model differently, not always optimally. After processing all this info I will think more to decide should I continue drinking coffee.
Take care.
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