Lung Function Research Analysis

Summary of Lung Function

Scientific Information on Lung Function

The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect lung function

Grade	Level of Evidence [show legend]
	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

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
Pelargonium sidoides	Minor	Very High See all 10 studies	Secondary to treating sickness (bronchitis, URTIs, common cold) there is improvement in sputum content, rhonchi, breathing, coughing, and chest pain while coughing relative to placebo; while the improvements are marked, they only occur secondary to treating illness.
Creatine	-	Very High See all 7 studies	No effect on healthy people or on disease states characterized by impaired lung function.
Marijuana	Minor	Very High See all 3 studies	While smoking per se is seen as negative, infusions of THC enhance lung function and acute usage of marijuana as joints seem to confer more benefit to lung function than drawbacks.
N-Acetylcysteine	-	- See study
Moringa oleifera

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

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