Guide
Slippery elm vs. turmeric: what's actually different
Slippery elm and turmeric aren't studied for the same thing: slippery elm's evidence is two small, uncontrolled multi-ingredient formula studies with no isolated dose, while turmeric's curcumin has been tested in trials up to 12,000 mg a single dose. The two appeared together in one of the formulas behind slippery elm's own evidence.
Slippery elm and turmeric aren't the same kind of ingredient and aren't studied for the same thing: slippery elm's presumed effect is mechanical, a mucilage gel that coats a surface, while turmeric's studied compound, curcumin, is a chemical constituent absorbed and acting elsewhere in the body. Their research bases are also very different sizes — turmeric's is much larger.
Different mechanisms, different research
Slippery elm's defining property, identified in a 1950 chemical analysis of the bark, is mucilage — a polysaccharide that gels on contact with water. No published human trial has tested slippery elm by itself at any dose; the only relevant human research combined it with several other active ingredients in small, open-label pilot studies with no placebo. Turmeric's studied compound, curcumin, works differently and has a much larger evidence base, though absorption is its own separate problem: a 2006 dose-escalation study gave healthy volunteers single oral doses of a standardized curcumin extract from 500 mg up to 12,000 mg, finding only minimal, non-dose-related side effects in about 30% of participants — but curcumin was barely detectable in the blood even at the highest doses, underlining how poorly it absorbs regardless of amount.
| Slippery elm | Turmeric (curcumin) | |
|---|---|---|
| Presumed mechanism | Mechanical: mucilage gel coats a surface | Chemical: curcumin absorbed and acting elsewhere in the body (poorly, at that) |
| Human trials at an isolated dose | None published | Many, typically 500-12,000+ mg of a standardized extract |
| Typical retail form | Powder, capsule, lozenge, tea | Root powder or standardized curcuminoid extract |
They've appeared together in one study
The two aren't entirely unrelated on paper: a 2020 study followed 43 Australian adults through 16 weeks of a seven-ingredient digestive formula that combined curcumin, aloe vera, slippery elm, guar gum, pectin, peppermint oil and glutamine, starting at 5 grams a day and increasing to 10. Symptoms including heartburn, indigestion and abdominal pain fell substantially on symptom questionnaires, but with seven active ingredients combined and no control group, the result can't be credited to either curcumin or slippery elm specifically — or to their combination as opposed to any of the other five ingredients.
Questions people ask
Is slippery elm the same as turmeric?
No. They're unrelated plants — slippery elm is tree bark valued for mucilage, turmeric is a root valued for curcumin — studied for different things, with very different amounts of human research behind them.
Can you take slippery elm and turmeric together?
No trial has tested the two-ingredient combination specifically. They appeared together as two of seven ingredients in one uncontrolled formula study, described above, which doesn't isolate what either one does on its own or how they interact together.
Which is better, slippery elm or turmeric?
They aren't answering the same question, so "better" doesn't really apply. Turmeric's curcumin has a far larger dose-tested research base; slippery elm's is close to nonexistent outside multi-ingredient formulas. Which matters more depends on what you're trying to address.
Related reading: what is slippery elm, slippery elm benefits: what the research does and doesn't show, and turmeric dosage.
Sources
- Chemical constitution of slippery elm mucilage; isolation of 3-methyl d-galactose from the hydrolysis products Slippery elm's mucilage is a polysaccharide built from several sugars, including 3-methyl-D-galactose — the chemical basis for the gel it forms in water.
- Herbal formula improves upper and lower gastrointestinal symptoms and gut health in Australian adults with digestive disorders A 16-week uncontrolled study of a seven-ingredient gut-health formula containing slippery elm reported large reductions in GI symptoms, but the formula's other six ingredients make it impossible to credit slippery elm alone.
- Dose escalation of a curcuminoid formulation A 2006 study gave healthy volunteers single doses of a standardized curcumin extract ranging from 500 mg to 12,000 mg. Side effects were minimal and not related to dose, but curcumin was barely detectable in the blood even at the highest doses — confirming how poorly it absorbs regardless of how much is taken.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.