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Dry Eyes

Research analysis led by Kamal Patel .
Reviewed by
Examine.com Team
Last Updated:

Summary of Dry Eyes

Primary Information, Benefits, Effects, and Important Facts

Scientific Information on Dry Eyes

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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 dry eyes.
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.
Supplement 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 Strong Very High See 2 studies
The benefits of trehalose containing eye drops appears to be greater than not only placebo (saline) eye drops, but also eye drops containing either hyaluronan (Hyalein) or hydroxyethylcellulose (Mytear) which are proven commercial products for dry eyes.
grade-c Minor - See study
The complaint of 'dry eyes' appears to be slightly reduced in postmenopausal women given 80mg of the isoflavones as a supplement.
grade-c Minor - See study
2g of the oil daily is able to reduce symptoms of dry eyes, particularly reddening and the actual perceived dryness