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Nasal Congestion

Nasal congestion refers to conditions such as allergic rhinitus or sickness where an excess of mucus is able to clog the nasal passages and impair breathing. Some supplements are said to reduce this congestion.

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

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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 nasal congestion
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-b Notable Very High See all 4 studies
Nasal congestion appears to be decreased with supplementation of this herb, and while this is noted in acute bronchitis (most potently) it also affects other bacterial or viral instances such as the common cold and acute rhinosinitus.
grade-c Strong - See study
The decrease in nasal congestion seen in the one study was remarkably strong relative to placebo in a model of allergic rhinitus; it is not sure if this applies to other causes of nasal congestion.
grade-c Strong - See study
In persons suffering from allergic rhinitus, nasal congestion is completely resolved in around two-thirds of persons. Currently no studies in nasal congestion for persons without allergies.
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All comparative evidence is now gathered in our ​A-to-Z Supplement Reference.

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