BLUF
Research shows caffeine lifts positive mood most strongly soon after waking. The effect fades as the day goes on. It seems to boost enthusiasm more than it reduces stress—making timing, fatigue, and context key to everyday performance and wellbeing.Learning Outcomes
• Understand how timing of caffeine use affects alertness and emotional readiness.
• Apply insights on fatigue management to improve focus during early tasks.
• Recognise limits of caffeine for stress reduction across long work periods.
