Synopsis

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

Slippery elm bark (Ulmus rubra) has a long history of use in North American herbal medicine, particularly among Native American tribes and later among European settlers. Its traditional use for ulcers, both gastric and duodenal, is based on its mucilaginous (gel-like) properties. When mixed with water, slippery elm bark forms a soothing, viscous substance that coats the lining of the stomach and intestines. This protective barrier is thought to shield irritated tissues from stomach acid and promote healing. Several historical texts and herbal compendiums, including the U.S. Pharmacopeia in the 19th century, list slippery elm as a demulcent for gastrointestinal complaints. Despite its popularity in traditional medicine, scientific evidence supporting slippery elm bark for ulcer treatment is limited. Some in vitro (test tube) studies suggest that the mucilage may reduce irritation and inflammation. A handful of small clinical trials and case reports suggest potential symptomatic relief for patients with sore throat, acid reflux, or mild digestive upset, but rigorous studies specifically investigating ulcer healing are lacking. Major reviews and regulatory bodies generally acknowledge its safety as a food supplement but do not endorse it as an ulcer treatment due to insufficient clinical data. In summary, slippery elm’s reputation for supporting ulcer care is primarily traditional, with low-level evidence and little scientific validation.

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