On the other hand, coffee has been shown to be good for heart health! Too much caffeine – equivalent to more than four cups of coffee per day – can be dangerous and increase the chance of developing heart problems. When you drink a cup of coffee, your heart rate and blood pressure can increase, making coffee consumption safe only for people without any underlying heart conditions. Another receptor called the A2A receptor controls our mood by regulating the amount of the neurotransmitter dopamine.īesides being a psychoactive substance, caffeine is also a stimulant.
Over the course of a day, more adenosine binds with A1 receptors, making us feel sleepier as nighttime and sleep approach. When adenosine binds with A1 receptors, it promotes relaxation and sleep. Two of the most important are A1 receptors and A2A receptors. Adenosine has several receptors, each with its own effects. In our brains, receptors can bind with certain molecules to elicit neurological responses. Chemically, caffeine is very similar to adenosine, and this similarity is what allows caffeine to interact with our brains.īefore we can understand how caffeine works, we must first understand adenosine.Īdenosine is an organic compound that has a variety of effects on the human brain and plays an important role in regulating sleep and balancing brain activity and mood.
Caffeine is a psychoactive substance, meaning it affects how your mind works and can alter your mood, consciousness, and cognition.
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