Botanical

Slippery Elm

Ulmus rubra inner bark

Evidence TierDWADA NOT PROHIBITED

tuneTypical Dose

Use product-specific dosing and separate from medications when possible

watchEffect Window

Any soothing effect should be noticed quickly if it occurs.

check_circleCompliance

WADA NOT PROHIBITED

Overview

Clinical Summary

Slippery elm is best framed as a traditional demulcent for throat or GI soothing, because direct human evidence is sparse and mostly blend based.

Slippery elm is mainly a mucilage-rich soothing herb. That traditional framing still makes the most sense today. Direct human evidence is limited, and the main clinical trial exposure is through multi-herb GI formulas rather than isolated slippery elm. That means it should be treated as a low-confidence soothing agent, not a clinically validated GI treatment.

Slippery elm contains mucilage that can coat irritated mucosal surfaces. The mechanism supports a soothing role, but the direct human evidence is limited.

Outcomes

What This Is Expected To Influence

Primary Outcomes

  • Low-confidence symptom soothing for throat or GI irritation

Secondary Outcomes

  • No strong standalone evidence for IBS or reflux treatment

Safety

Contraindications and Interactions

Contraindications

  • Unexplained significant GI symptoms

Side effects

  • Mild GI fullness

Interactions

  • Oral medications

Avoid if

  • You are relying on it to treat persistent reflux, bleeding, weight loss, or severe GI pain

Evidence

Study-level References

se-SRC-001Pilot randomized trial
Sourceopen_in_new

Hawrelak JA, Myers SP. Effects of two natural medicine formulations on irritable bowel syndrome symptoms: a pilot study. J Altern Complement Med. 2010;16(10):1065-1071. doi:10.1089/acm.2010.0197. PMID:20954962.

Population: Adults with irritable bowel syndrome.

Dose protocol: Multi-herb IBS formula containing slippery elm for 4 weeks

Key findings: Improved several IBS symptoms during treatment.

Notes: Not attributable to slippery elm alone.

Paper content

This is one of the rare human trials that includes slippery elm, but it uses a multi-herb IBS formula rather than isolated slippery elm. It supports only low-confidence GI-soothing framing.

se-SRC-002Controlled clinical trial.
Sourceopen_in_new

Ried K, Travica N, Dorairaj R, Sali A. Herbal formula improves upper and lower gastrointestinal symptoms and gut health in Australian adults with digestive disorders. Nutr Res. 2020;76:37-51. doi:10.1016/j.nutres.2020.02.008. PMID:32151878.

Population: Australian adults with digestive disorders.

Dose protocol: Multi-ingredient GI formula containing slippery elm for 16 weeks

Key findings: 60 to 80% improvement in GI symptoms, normalized intestinal permeability, and nearly half of PPI users able to discontinue.

Notes: Multi-ingredient design. Cannot attribute effects to slippery elm alone.

Paper content

This 16-week controlled trial tested a multi-ingredient GI formula containing curcumin, Aloe vera, slippery elm, guar gum, pectin, peppermint oil, and glutamine in 43 adults with digestive disorders. GI symptoms improved by 60 to 80%, intestinal permeability normalized in most participants, and nearly half of participants on proton pump inhibitors were able to discontinue them. The multi-ingredient design prevents attribution to slippery elm alone, but the study provides additional context for slippery elm as part of a demulcent and gut-supportive formulation approach.

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