Evidence supporting the use of: Slippery elm bark
For the body system: Lungs

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Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Slippery elm bark (Ulmus rubra) has a long history of traditional use in North American herbal medicine, particularly among Indigenous peoples and early settlers. It is primarily valued for its mucilaginous properties—the inner bark contains polysaccharides that, when mixed with water, form a soothing gel. This mucilage is thought to coat and soothe inflamed mucous membranes, including those of the respiratory tract. Historically, slippery elm bark has been made into teas, lozenges, or syrups to help alleviate coughs, sore throats, and irritation associated with bronchitis or other lung complaints.

However, scientific evidence supporting its effectiveness specifically for lung or respiratory conditions is limited. Most available studies focus on its benefits for digestive issues, such as sore throats, gastroesophageal reflux, or mild gastrointestinal discomfort. There is a lack of rigorous clinical trials confirming efficacy for lung support. Despite this, the demulcent action is plausibly beneficial for symptoms like throat irritation or cough, which are often associated with respiratory issues.

In conclusion, slippery elm bark’s use to support the lungs is primarily justified by traditional herbal practice, with a modest level of plausibility but limited direct scientific validation. Its main value lies in soothing irritated tissues rather than directly impacting lung function or treating underlying respiratory diseases.

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