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Reaction Time

Reaction time is a cognitive parameter. The shorter your reaction time, the faster your reflexes.

Research analysis led by .
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Last Updated:

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Human Effect Matrix

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The Human Effect Matrix looks at human studies to tell you what supplements affect Reaction Time.

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Grade Level of Evidence
Robust research conducted with repeated double-blind clinical trials
Multiple studies where at least two are double-blind and placebo controlled
Single double-blind study or multiple cohort studies
Uncontrolled or observational studies only
Level of Evidence
? The amount of high quality evidence. The more evidence, the more we can trust the results.
Supplement Magnitude of effect
? The direction and size of the supplement's impact on each outcome. Some supplements can have an increasing effect, others have a decreasing effect, and others have no effect.
Consistency of research results
? Scientific research does not always agree. HIGH or VERY HIGH means that most of the scientific research agrees.
Notes
grade-b Minor Moderate See all 5 studies
Although the overall effect is unreliable and context dependent, caffeine appears to improve reaction time (possibly at the cost of accuracy)
grade-b Minor High See all 3 studies
An improvement in reaction time (decrease) is noted in both healthy and normal persons as well as those undergoing either drug addiction or sleep deprivation. This may be related to the alertness promoting effects of the compound.
grade-c Notable - See study
The one study to measure reaction time noted an astounding decreased (approximately 40% reduction), which needs to be replicated

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