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Scientific Information on Erections
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The Human Effect Matrix looks at human studies (excluding animal/petri-dish studies) to tell you what what supplements affect Erections
| Grade | Level of Evidence |
|---|---|
| A | Robust research conducted with repeated double blind clinical trials |
| B | Multiple studies where at least two are double-blind and placebo controlled |
| C | Single double blind study or multiple cohort studies |
| D | Uncontrolled or observational studies only |
| Level of Evidence | Supplement | Change | Magnitude of Effect Size | Scientific Consensus | Comments |
|---|---|---|---|---|---|
| B | Yohimbine | ![]() ![]() ![]() Minor | 100% See study | Erections are increased following yohimbine ingestion which is thought to be a combination of alpha-2-adrenergic antagonism (enhancing relaxation of the penile tissue so... show | |
| B | Panax Ginseng | ![]() ![]() ![]() Minor | An improvement in erectile dysfunction is seen with 3g of Korean Red Ginseng (fermented panax ginseng, regular panax ginseng not as well tested) which is thought to be... show | ||
| C | Butea Superba | 100% See 2 studies | Currently assumed to be ineffective for erections or erectile dysfunction due to the poor quality of the evidence in existence. | ||
| C | Ashwagandha | 100% See study | Unable to aid psychogenic erectile dysfunction more than placebo | ||
| C | Coenzyme Q10 | ![]() ![]() ![]() Minor | 100% See study | Increased erectile function has been noted with CoQ10, but this may be secondary to reductions in symptoms of Peyronie's Disease | |
| C | Maca | ![]() ![]() ![]() Minor | 100% See study | An increase in erection frequency has been noted in men, likely related to the libido enhancing properties | |
| C | Dehydroepiandrosterone | 100% See study | No significant influence on erectile properties in persons with sexual dysfunction | ||
| D | L-Carnitine | ![]() ![]() ![]() Minor | 100% See study | One study has noted an improvement in erections in persons thought to have impaired blood flow | |
| D | Pycnogenol | ![]() ![]() ![]() Minor | 100% See study | May be proerectile in persons with organic erectile dysfunction (due to poor blood flow) | |
| D | Citrulline | ![]() ![]() ![]() Minor | 100% See study | Hardness of erections in persons with mild erectile dysfunction appears to be increased following supplementation of citrulline supplementation. |
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(Users who contributed to this page include Sol, KurtisFrank, conlank, herman_gill)