brain, caffeine temporarily blocks adenosine receptors. Adenosine is a chemical that gradually builds up during waking hours and contributes to feelings of sleepiness.
By interfering with this process, caffeine can make you feel more awake and mentally alert.
Depending on the person and the amount consumed, coffee may temporarily improve:
- Attention
- Reaction time
- Concentration
- Perceived energy
- Short-term mental performance
Caffeine usually begins having noticeable effects within roughly 15 to 45 minutes, although timing can vary.
2. Your Brain May Feel More Motivated
Caffeine also influences several brain signaling systems related to arousal and motivation.
This is one reason many people describe coffee as making them feel more energetic, focused, or ready to tackle difficult tasks.
However, it is more accurate to say caffeine modifies neurotransmitter activity than to claim that coffee simply “boosts serotonin and dopamine.” Its effects on mood are more complex than that.
3. Coffee and Mood
Observational
