Human Effect Matrix
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 [show legend]|
|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.
|Cocoa Extract||Notable||Very High See all 20 studies|
|Pycnogenol||Notable||Very High See all 3 studies|
|Arginine||Minor||Low See all 6 studies|
|Green Tea Catechins|
|Grape Seed Extract|
|Conjugated Linoleic Acid|
|Red Clover Extract|
|Vitamin B3 (Niacin)|