Caffeine is a naturally occurring central nervous system stimulant and is officially recognized as the most widely consumed psychoactive substance in the world. It acts primarily as an adenosine receptor antagonist to temporarily stave off drowsiness and boost mental focus. 🧠 How It Works in the Brain
Blocks Adenosine: Adenosine is a chemical that builds up in your brain throughout the day, binding to receptors to make you feel tired. Caffeine mimics the structure of adenosine, binding to these same receptors and blocking them.
Triggers Feel-Good Chemicals: By blocking adenosine, caffeine indirectly increases the release of other neurotransmitters like dopamine and norepinephrine, which elevate alertness, mood, and processing speed.
Releases Adrenaline: It stimulates the adrenal glands to pump out adrenaline, raising your heart rate and opening up airways. 🌱 Common Sources
Caffeine is found naturally in the leaves, seeds, and fruits of more than 60 plants. Common dietary sources include: Coffee and Health.org All about caffeine – Coffee & Health
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