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Sleep Duration

The amount of time spend sleeping during the night.

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

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Human Effect Matrix

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The Human Effect Matrix looks at human studies to tell you what supplements affect Sleep Duration.

Full details on all Sleep Duration supplements are available to Examine members.
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-d - - See study
grade-d - - See study
One study found no apparent effect of an algal DHA supplement on children.
grade-d - - See study

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Things to Note

Also Known As

sleep time

Do Not Confuse With

Sleep Latency