Human Effect Matrix
The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect attention
| Grade | Level of Evidence |
|---|---|
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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 |
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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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Bacopa monnieri |
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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Cocoa Extract | |||
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Ginkgo biloba | |||
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CDP-choline | |||
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Centella asiatica | |||
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D-Serine | |||
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L-Carnitine | |||
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Modafinil | |||
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Nigella sativa | |||
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Phosphatidylserine | |||
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Pycnogenol | |||
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Creatine | |||
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Fish Oil | |||
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Marijuana | |||
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Melatonin | |||
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Melissa officinalis | |||
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Red Clover Extract | |||
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Rhodiola Rosea | |||
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S-Adenosyl Methionine | |||
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Theanine | |||
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Peppermint | |||
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Pueraria lobata | |||
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Nicotine | |||