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Skin Quality

Skin quality tends to refer to an overall evaluation on (facial) skin parameters such as tightness, moisture content, and clearness from acne. Supplements that improve skin quality can be taken orally or topically as a cream.

Research analysis lead by Kamal Patel
All content reviewed by Examine.com Team. Published:
Last Updated:

Human Effect Matrix

The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect skin quality
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 mo re 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.
grade-b Vitamin A - - See all 3 studies
grade-c Bladderwrack Minor - See study
Limited evidence supports its efficacy, difficult to assess potency due to no reference drug.
grade-c Green Tea Catechins Minor - See study
Oral ingestion of high dose catechins (1400mg) has been shown to improve skin quality
grade-c Pycnogenol Minor - See study
Oral supplementation of standard doses of procyanidins can improve skin quality in elderly women, other demographics not tested
grade-c Red Clover Extract  
grade-c Vitamin B3 (Niacin)  
grade-c Astaxanthin  
grade-d Orthosiphon stamineus  
grade-d Alpha-Lipoic Acid  
grade-d Boswellia serrata  
grade-d Ginkgo biloba  
grade-d Hemp Protein  

All comparative evidence is now gathered in our ​A-to-Z Supplement Reference.

The evidence for each separate supplement is still freely available ​here.