Human Effect Matrix
The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect cognition
| Grade | Level of Evidence |
|---|---|
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Robust research conducted with repeated double-blind clinical trials |
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| Multiple studies where at least two are double-blind and placebo controlled |
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| Single double-blind study or multiple cohort studies |
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| Uncontrolled or observational studies only |
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Level of Evidence ?
The amount of high quality evidence. The more evidence, the more we can trust the results.
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Outcome |
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.
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Consistency of research results ?
Scientific research does not always agree. HIGH or VERY HIGH means that most of the scientific research agrees.
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Notes |
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Rhodiola Rosea |
All comparative evidence is now gathered in our Supplement Goals Reference. The evidence for each separate supplement is still freely available here. |
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D-Serine | |||
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Ginkgo biloba | |||
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L-Tyrosine | |||
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Modafinil | |||
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Panax ginseng | |||
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Phosphatidylserine | |||
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Glycine | |||
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Green Tea Catechins | |||
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Kava | |||
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L-Carnitine | |||
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Nicotine | |||
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Nigella sativa | |||
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Phenylpiracetam | |||
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Pycnogenol | |||
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Sceletium tortuosum | |||
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Zinc | |||
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Bacopa monnieri | |||
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Black Cohosh | |||
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Choline | |||
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Cocoa Extract | |||
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Dehydroepiandrosterone | |||
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Marijuana | |||
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Resveratrol | |||
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Sarcosine | |||
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Pramiracetam | |||
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Pueraria lobata | |||
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Piracetam | |||