Testing the best daily caffeine dose for sleep and alertness
Part of Brain & nervous system, Mental health clinical trials.
This study compares an adjusted caffeine plan versus a typical caffeine dose to see how it affects your sleep timing and daytime alertness. It may help find a caffeine amount that supports wakefulness without disrupting sleep.
Summary written for real people, not researchers, by Clin2.
Who can take part
- Be 18 to 39 years old
- Pass a short quiz about the study rules with at least 80% correct
- Usually sleep about 6 to 9 hours per night (not less than 6 or more than 9 on average)
- On most weeknights, your bedtime is not very early (not before about 9:00 pm)
- On most weekdays, you wake up not very late (not after about 9:00 am)
Quick eligibility check
Answer a few plain-language questions, based on this study's own requirements, to get a preliminary sense of fit.
Similar studies
Other trials that look related to this one.
This study tests whether taking caffeine in the morning can help young men with weight-training experience think more clearly and perform better during repeated sprints. You will be asked to complete cognitive and exercise tests after taking either caffeine or a placebo.
This study tests a supplement containing caffeine, vitamins, minerals, and plant extracts to see if it helps thinking, sleep, and overall well-being. You would take the supplement or a placebo for a period and complete tasks and questionnaires.
This study uses brain scans to see how caffeine affects the way we learn from rewards and punishments. You may be eligible if you are a healthy adult who drinks a moderate amount of caffeine daily.
This study tests a single dose of an investigational medicine in healthy people who are sleep-deprived. It helps researchers understand how the medicine works in the body when you haven't slept, which could lead to new treatments for sleepiness.
This study explores how your internal body clock and sense of time change during 36 hours of staying awake. You will stay in a lab and complete simple tasks to help researchers understand the link between circadian rhythms and time perception.
This study tests a non-painful brain stimulation during the first part of sleep to see how it affects slow, deep-sleep brain rhythms. It is mainly for healthy young adults who can follow a strict sleep schedule.
Hear when a new Sleep Deprivation trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.