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Rate of Sickness

Research analysis led by Kamal Patel.
All content reviewed by the Examine.com Team. Published: Jun 28, 2017
Last Updated:

Summary of Rate of Sickness

Primary Information, Benefits, Effects, and Important Facts

Scientific Information on Rate of Sickness

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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 rate of sickness
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.
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 Strong Very High See 2 studies
The rate (frequency of occurring) of the common cold has twice been found to be reduced by 60-70% in persons who take garlic supplementation daily; this is associated with both allicin and the aged garlic extract, and requires higher doses (2.5g aged extract or 180mg allicin).
grade-c Minor - See study
In regards to the common cold and infections, the rate of catching sickness with daily supplementation of zinc in persons who may be deficient is reduced.