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Risk of Cataracts

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

Summary of Risk of Cataracts

Primary Information, Benefits, Effects, and Important Facts

Scientific Information on Risk of Cataracts


Human Effect Matrix

The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect risk of cataracts
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.
Notes
grade-c Vitamin C - - See study
No significant influence on the risk of cataracts
grade-c Vitamin E - - See study
Vitamin E in isolation at tested doses of 500 IU has failed to show any protective effect on cataract formation or continued pathology, despite multinutrient formulations showing benefit (likely due to other compounds in the formulation).

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

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