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Executive Function

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Summary of Executive Function

Scientific Information on Executive Function

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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 Executive Function.

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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-c Minor - See study
According to the CNS Vital SignR test in middle aged adults, pre-testing administration of Kanna appeared to increase executive function when compared to placebo.
grade-d Minor High See all 3 studies
Possible improvement in a couple of studies that administered cognitive tests, though not all studies found an effect.
grade-d Minor High See all 3 studies
Potentially a small increase but the evidence is weak, and one study found a decrease. Much more research is needed.

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