Power Output

Power Output is the ability to procure a large amount of strength in a rapid manner, and considered both muscular and neural factors. Supplements that increase power output are of interest to atheltes and strength enthusiasts.

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Human Effect Matrix

The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect power output

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.
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.
Consistency of research results
? Scientific research does not always agree. HIGH or VERY HIGH means that most of the scientific research agrees.
Notes
Creatine
All comparative evidence is now gathered in our ​Supplement Goals Reference.
The evidence for each separate supplement is still freely available ​here.
HMB  
Sodium Bicarbonate  
Caffeine  
Arachidonic acid  
Beta-Alanine  
Chromium  
Colostrum  
Dehydroepiandrosterone  
L-Carnitine  
Trimethylglycine  
Whey Protein  
Alpha-GPC  
Ashwagandha  
Spirulina  
Alcohol  
Clenbuterol  
Resveratrol  
Terminalia arjuna  
Theaflavins  
Ursolic Acid  
Velvet Antler  
Alanylglutamine  
Anatabine  
Arginine  
Astaxanthin  
Branched Chain Amino Acids  
D-Aspartic Acid  
Ecdysteroids  
Ephedrine  
Gamma Oryzanol  
Glutamine  
Kaempferia parviflora  
Leucic Acid  
Leucine  
Marijuana  
N-Acetylcysteine  
Nitrate  
Pyruvate  
Rhodiola Rosea  
Tribulus terrestris  
Vitamin D  
Yohimbine  
Eurycoma Longifolia Jack