Does Caffeine Wake You Up or Slow You Down As An Entrepreneur?

A lot of us rely on our morning cup of coffee or tea to wake up and feel more alert in the morning. This can help us to clear the fog of ‘sleep inertia’ that will typically follow us around for a while after we have been asleep and it has been shown in studies to improve memory, focus and even long-term brain health.

And yet despite all this, caffeine is also something we’re often told not to rely on too much. We’re told that caffeine is bad for us and that it is addictive. So what’s the reality? Should we use it to wake up? Or are we causing more harm than good?


How Caffeine Works

A good place to start is by looking at precisely what caffeine does to the body.


Essentially, caffeine’s effects occur because it is able to replace a substance called adenosine. Caffeine and adenosine are molecularly very similar and this means that when you have more caffeine in the blood, your body will mistake it for adenosine.


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This then allows the caffeine to bind to adenosine receptors, preventing it from being effective. It’s like putting a fake key in the lock so that the real key can’t fit in.


To understand what caffeine does then, we need to figure out what it stops adenosine from doing. And the easy answer to that, is that it prevents adenosine from making us feel groggy and sleepy. Adenosine is a by-product of the energy process in the brain and so the longer we’re awake and more we use our brain, the more adenosine builds up. Adenosine is a neuroinhibitor, meaning that it reduces activity in the brain cells and makes them less likely to fire. That’s why we can barely think by the end of the day and need to go to sleep.


When you consume caffeine, it reverses this effect, making us feel more awake and alert. This then triggers a cascade of other neurotransmitters in the brain associated with wakefulness and attention – such as dopamine (the motivation neurotransmitter), such as norepinephrine (an analogue of adrenaline) and such as cortisol.

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