Effectiveness Rating for Caffeine's Ability to Increase Alertness

The effectiveness rating is a measure of how well caffeine is able to increase alertness. The overall rating for this claim is 3 out of 3. The research shows the supplement's ability to deliver on this particular claim is warranted. Using Caffeine to increase alertness will most likely lead to positive results.

Confidence Rating for Caffeine's Ability to Increase Alertness

The confidence rating is a mesure of how valid the effectiveness rating is. This rating is based on how many studies are included in the database on this topic.

There are 6 studies in the database on caffeine; the confidence rating is 120. A score above 80 means the effectiveness rating for this supplement is reliable. A score under 80 means there is insufficient evidence to ensure a reliable effectiveness rating.


Title of Study
Effects of caffeine, sleep loss, and stress on cognitive performance and mood during U.S. Navy SEAL training. Sea-Air-Land
The effect of ephedra and caffeine on maximal strength and power in resistance-trained athletes
Effects of repeated doses of caffeine on performance and alertness: new data and secondary analyses
Psychostimulant and other effects of caffeine in 9- to 11-year-old children
Effect of Caffeine on Golf Performance and Fatigue during a Competitive Tournament
Effects of caffeine on mood and performance: a study of realistic consumption