Coffee is a well-known tool that helps millions of people fight their sleepiness every day.
Meanwhile, some people claim that coffee doesn't work for them - or makes them even sleepier!
Let's find out why it might happen.
Adenosine Rebound
Caffeine works by blocking adenosine receptors in the brain.
Adenosine is a neurotransmitter that promotes sleep and relaxation.
When the effects of caffeine wear off, there can be a rebound increase in adenosine, making a person feel more tired.
Sleep-wake Cycle Disruption
Caffeine can interfere with the natural sleep-wake cycle.
If consumed close to bedtime, it may disrupt the circadian rhythm, confusing the body and causing drowsiness instead of alertness.
Individual Sensitivity
People vary in their sensitivity to caffeine.
Some individuals may experience an energy "crash" or fatigue as the stimulant effects wear off, leading to a desire for sleep.
Dehydration
Coffee has diuretic effects, which means it can increase urine production and contribute to dehydration.
Dehydration can cause feelings of fatigue and drowsiness.
Blood Sugar Fluctuations
Coffee consumption, especially if paired with sugary additives, can lead to fluctuations in blood sugar levels.
A rapid drop in blood sugar can result in feelings of tiredness.
Stress Hormones
Caffeine triggers the release of stress hormones like cortisol.
While this can provide a temporary energy boost, the subsequent decline in cortisol levels might make some individuals feel more relaxed or even sleepy.
Genetic Factors
Genetic variations can influence how individuals metabolize caffeine.
Some people may be more prone to experiencing a calming effect rather than heightened alertness.
Recently, we talked about rabbit meat.
