The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect blood flow
|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.
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.
All comparative evidence is now gathered in our Supplement Goals Reference.
The evidence for each separate supplement is still freely available here.
|Green Tea Catechins|
|Grape Seed Extract|
|Conjugated Linoleic Acid|
|Red Clover Extract|
|Vitamin B3 (Niacin)|