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

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Synopsis

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

Slippery elm bark (Ulmus rubra) has a long history of use in traditional herbal medicine, particularly by Native American tribes and early North American settlers. It is most commonly used as a demulcent, meaning it helps to soothe and protect irritated mucous membranes. For the bronchial system, this demulcent action is thought to coat the throat and airway linings, alleviating cough and throat irritation associated with bronchitis, sore throat, or other upper respiratory complaints. Historical records and ethnobotanical literature cite preparations such as slippery elm tea or lozenges for calming coughs and facilitating easier breathing, but these uses are based on tradition rather than robust scientific research.

Modern scientific validation for slippery elm’s efficacy in supporting bronchial health is limited. While its mucilage content clearly soothes surfaces it comes in contact with, there is little clinical evidence demonstrating effectiveness specifically for bronchial or lower respiratory tract conditions. Most research and reviews note the lack of well-designed human studies. Regulatory agencies such as the FDA generally recognize slippery elm as safe, but they do not endorse it for treating bronchial conditions due to insufficient clinical data. Thus, while slippery elm bark’s use for the bronchial system is well established in traditional herbalism, scientific support remains modest.

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