Slippery Elm

Soothing tree bark providing protective mucilaginous coating for digestive tract healing and comfort

Scientific nameUlmus rubra FormulaVarious mucilaginous polysaccharides Molecular weightVariable mucilaginous compounds g/mol CASVarious natural compounds

60 absorption score

9 safety / 10

20 USD per month

5 documented interactions

Check it against something

Evidence level C

Slippery Elm with:

80 out of 100

Works better together Take together — same timing window amplifies the synergy.

Check it against your whole stack →

What it does

mechanism and evidence for each claim

Digestive tract protection and coating

Forms protective mucilaginous coating over irritated digestive surfaces

Mucilage creates soothing protective barrier on gut lining Evidence B-grade 30 minutes to 4 hours

Gut lining healing and soothing

Promotes healing of damaged intestinal lining and reduces irritation

Mucilaginous compounds soothe inflammation and support tissue repair Evidence B-grade 1-6 weeks

Diarrhea and loose stool management

Helps normalize bowel movements and reduce diarrhea

Absorbs excess water and provides bulk to stools Evidence B-grade 4-24 hours

Heartburn and acid reflux relief

Soothes esophageal and stomach irritation from acid reflux

Protective coating shields tissues from stomach acid Evidence C-grade 30 minutes to 2 hours

Throat and respiratory soothing

Traditional use for soothing throat irritation and cough

Mucilaginous coating soothes irritated throat and respiratory tissues Evidence C-grade 15-60 minutes

Others take these for the same thing

Same goal, different mechanism — check any of them against this one

Probiotics for Autoimmune Disease Support Gut health & immune modulation 10-100 billion CFU daily B 60% Magnesium Glycinate Superior absorption sleep & muscle support 200-600 mg A 90% Magnesium Citrate Balanced absorption & digestive support 300-600 mg A 35% Chloride Electrolyte & digestive support 2300mg A 95% Bone Broth Collagen Gut healing & collagen support 20-40g powder B 85% Psyllium Husk Digestive health & cholesterol support 5-15g A 95%

Every pair we checked

12 combinations scored by the engine

Slippery Elm + Caffeine No documented interaction either way No known interaction 70

Slippery Elm + Creatine Monohydrate No documented interaction either way No known interaction 70

Slippery Elm + Vitamin D3 No documented interaction either way No known interaction 70

Slippery Elm + Calcium Carbonate No documented interaction either way No known interaction 70

Slippery Elm + Whey Protein No documented interaction either way No known interaction 70

Slippery Elm + Lactase No documented interaction either way No known interaction 70

Slippery Elm + Bovine Collagen No documented interaction either way No known interaction 70

Slippery Elm + DHA No documented interaction either way No known interaction 70

Slippery Elm + Turmeric No documented interaction either way No known interaction 70

Slippery Elm + Lactobacillus acidophilus Comprehensive gut health support Works better together 75

Slippery Elm + Marshmallow Root Enhanced mucilaginous protective and soothing effects Works better together 80

Slippery Elm + Aloe Vera Synergistic gut healing and protection Works better together 80

Dosage

Between meals or as needed

Daily400-800mg

Digestive protection400-800mg daily

Diarrhea management400-600mg as needed

Heartburn relief400mg before meals

Throat soothing200-400mg as needed

Before you take it

VeganYes

When to expect it

First Effects30 minutes to 4 hours for protective coating and soothing

Peak Benefits1-6 weeks for sustained digestive healing and protection

Deficiency DevelopmentNot applicable - herbal supplement

Toxicity OnsetVery rare, mainly drug absorption concerns

How to measure it

Not applicable

MarkerNot routinely monitored - assess through symptom improvement

OptimalImproved digestive comfort and normalized bowel function

Deficient belowNot applicable for herbal supplement

FrequencyMonitor through digestive symptom improvement

What people actually reported to the FDA

CAERS, 5 reports naming it as the suspect

Most reported effects

Thrombosis 2

Blood pressure increased 1

Headache 1

Abdominal pain 1

Alanine aminotransferase increased 1

Named as the suspect 5 reports of 9 that mention it at all

Serious outcome 89% hospitalisation, emergency room or worse

Other Serious or Important Medical Event3

Hospitalization3

Other Serious Outcome2

Reports are voluntary and unverified — they record what someone experienced while taking something, not what the compound caused. Counts skew towards products people take a lot of, and a serious outcome is more likely to be reported than a mild one, so these are not rates. How we filter them →

What actually reaches you

The label counts the carrier, your body does not

Absorption High 60 of 100 · absorbs well relative to other forms

Delivered daily 360 mg

Cost per 100 mg delivered $0.19 comparative — uses the absorption score, not a measured percentage

Works better with

3 documented

Marshmallow Root

Enhanced mucilaginous protective and soothing effects

Both provide protective mucilaginous coating · level C

Aloe Vera

Synergistic gut healing and protection

Complementary soothing and protective mechanisms · level C

Probiotics

Comprehensive gut health support

Protective coating creates favorable environment for beneficial bacteria · level C

What not to take with Slippery Elm

2 documented

Oral Medications

May reduce absorption of oral medications

Mucilaginous coating may interfere with drug absorption · moderate significance

Stimulant Laxatives

May interfere with rapid-acting laxatives

Protective coating may slow drug absorption · mild significance

Medication interactions

Discuss these with a pharmacist before combining

oral-medications-general Moderate

May slow or reduce absorption of oral medications

What to do: Take medications 2-3 hours before or after slippery elm

diabetes-medications Minor

May slow absorption affecting timing of blood sugar control

What to do: Monitor blood glucose, separate timing

no-major-interactions Minor

Generally safe but timing considerations important

What to do: Separate timing from medications

Available forms

bioavailability compared

Slippery Elm Bark Powder 60

Slippery Elm Bark Powder: Excellent safety, Protective coating, Natural soothing, Traditional use

Food sources

before you supplement

Slippery elm bark powder High mucilage content · 60

Slippery elm capsules Standardized bark powder · 55

Slippery elm lozenges Lower concentration for throat use · 40

Not found in common foods Tree bark preparation required · N/A

Too little

deficiency signs

Not applicable (herbal supplement, not essential nutrient):
General symptoms addressed by slippery elm:
Digestive tract irritation and inflammation
Damaged or sensitive gut lining
Diarrhea and loose stools
Heartburn and acid reflux
Throat irritation and cough

Too much

toxicity signs

Extremely safe with minimal side effects:
Potential drug absorption interference
Choking hazard if powder not mixed properly
Rare allergic reactions
Generally excellent safety profile

Who benefits most

digestive-inflammation-ibd

Excellent protective coating for inflamed digestive tract

400-800mg daily or 1-2 tsp powder

diarrhea-loose-stools

Helps normalize bowel movements and absorb excess water

400-600mg or 1 tsp powder as needed

heartburn-acid-reflux

Protective coating shields esophageal and stomach tissues from acid

400mg or 1/2 tsp powder before meals

gut-lining-damage

Supports healing and protection of damaged intestinal lining

400-800mg daily

throat-irritation-cough

Traditional soothing remedy for throat and respiratory irritation

200-400mg as needed

Where to buy it

compare forms first

Look for Slippery Elm at 400-800mg per serving. The form that matters here is Slippery Elm Bark Powder.

Find on Amazon

Affiliate link — we may earn a commission at no cost to you.

How it works

Mucilaginous polysaccharides form protective gel coating on digestive surfaces
Soothing and anti-inflammatory effects reduce gut irritation
Absorbs excess water helping to normalize stool consistency
Protective barrier shields tissues from stomach acid and irritants
Promotes tissue healing through gentle protective coating
Demulcent properties provide cooling and soothing effects

Key findings

what the evidence supports

Strong traditional use evidence for digestive protection
Excellent safety profile with minimal side effects
Effective mucilaginous protective coating properties
Limited modern clinical research but extensive historical use

Sources: NIH Examine.com · data reviewed 2026-08-02

Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →

Common questions

What are the benefits of Slippery Elm?

Documented effects: Digestive tract protection and coating; Gut lining healing and soothing; Diarrhea and loose stool management; Heartburn and acid reflux relief. Forms protective mucilaginous coating over irritated digestive surfaces

How much Slippery Elm should you take per day?

The common daily range is 400-800mg. By goal — digestive protection: 400-800mg daily; diarrhea management: 400-600mg as needed; heartburn relief: 400mg before meals; throat soothing: 200-400mg as needed.

When is the best time to take Slippery Elm?

Between meals or as needed. First effects are typically reported within 30 minutes to 4 hours for protective coating and soothing.

What are the side effects of Slippery Elm?

At excessive doses: Extremely safe with minimal side effects:, Potential drug absorption interference, Choking hazard if powder not mixed properly, Rare allergic reactions, Generally excellent safety profile. Safety rating at normal doses is 9 out of 10.

What should you not take with Slippery Elm?

Separate it from Oral Medications, Stimulant Laxatives by two to four hours. May reduce absorption of oral medications

Does Slippery Elm interact with medications?

Documented interactions with oral-medications-general, diabetes-medications, no-major-interactions. Discuss these with a pharmacist before combining.

How do you know if you need Slippery Elm?

The marker is Not routinely monitored - assess through symptom improvement, optimal range Improved digestive comfort and normalized bowel function. Common deficiency signs: Not applicable (herbal supplement, not essential nutrient):, General symptoms addressed by slippery elm:, Digestive tract irritation and inflammation, Damaged or sensitive gut lining.

Taken for

74 Digestion

Lactase · Lactobacillus acidophilus · Protease