Plants like coffee, tea, and guarana make this naturally occurring stimulant. People reach for a cup, a capsule, or a powder to sharpen alertness and shake off tiredness. Morning windows or stretches of demanding mental work are the most common times to take it.
Stimulants demand respect. Too much easily backfires into jitters, sleeplessness, or an upset stomach. Skip it if you are pregnant or managing a heart issue.