Evidence-based·Last reviewed May 30, 2026·How we grade evidence

Chinese Rhubarb

BotanicalBest before bed

Useful mainly for short-term relief of occasional constipation.

Quick decision guide

May help most

short-term relief of occasional constipation

Common dosing range

0.5–2 g dried root at bedtime

When to expect effects

6–12 hours

Watch out for

Stimulant laxative; short-term use only to avoid dependence and electrolyte loss

What is it

Chinese rhubarb (Rheum palmatum, sometimes also Rheum officinale), also called Turkish rhubarb or da huang, is the root of an Asian rhubarb species used in Chinese medicine as a laxative and digestive herb.

Is it worth it for you?

Use this as a quick fit check, not a diagnosis.

Worth considering if…

You need short-term relief of occasional constipation
Gentler measures (fiber, fluids) have not worked
You will use it for no more than about a week

Probably skip if…

You need a daily or long-term constipation solution
You are pregnant, breastfeeding, or under 12
You have IBD, bowel obstruction, kidney disease, or undiagnosed abdominal pain

How it works

Chinese rhubarb root contains anthraquinone glycosides (sennosides, rhein, emodin, aloe-emodin) similar to those in senna and cascara. After ingestion these are converted by colonic bacteria to active anthrones that stimulate colonic motility and increase intestinal secretion, producing a laxative effect 6 to 12 hours later. The root also contains tannins, which paradoxically have astringent (anti-diarrheal) effects in higher concentrations. At low doses or with prolonged use, the tannin effect dominates; at typical laxative doses, the anthraquinones dominate. Rhein has been investigated for kidney-protective and anti-inflammatory effects in animal models; clinical applications are mostly limited to traditional Chinese medicine contexts.

How to take it

1. Typical dose
0.5–2 g dried root powder
2. Timing
At bedtime, so the effect occurs the next morning
3. With food
With a full glass of water
4. How long to try
Short-term only; stop after one week if ineffective and seek medical evaluation

What to track

Bowel frequency and stool consistency
Cramping
Signs of dehydration or low potassium

2 commercial forms

Compare the main delivery options and what they’re best suited for.

Dried root powder or capsule

Most common form in herbal supplements.

Standard preparation; anthraquinones activated by gut bacteria.

TCM decoction

Traditional preparation in Chinese medicine.

Boiled water extract; used as part of multi-herb formulas.

Safety

Know the common side effects, key cautions, and who should avoid it.

Common side effects

Abdominal crampingReddish-brown urine discolorationElectrolyte loss (especially potassium)

Serious risks

  • Laxative dependence with chronic use

  • Electrolyte disturbance

  • Melanosis coli

Who should avoid it

  • Pregnant or breastfeeding women
  • Children under 12
  • People with intestinal obstruction, IBD, appendicitis, undiagnosed abdominal pain, or kidney disease

Pregnancy & breastfeeding

Avoid in pregnancy and breastfeeding; stimulant anthraquinone laxatives are not recommended.

Interactions

DigoxinMajor

Potassium loss can amplify digoxin toxicity and arrhythmia risk

Loop or thiazide diuretics, corticosteroids, licoriceModerate

Additive potassium loss

Other oral medicationsModerate

Faster intestinal transit may reduce drug absorption

Food sources

Garden rhubarb stalks (different species, no laxative effect)

Amount
1 cup
%DV
—

Choosing a product

What to look for on the label — and what to be skeptical of.

Look for…

Identified Rheum species and dried-root dose
Explicit short-term-use directions

Be skeptical of…

Safe for daily long-term use
Detox or cleanse claims
Weight-loss laxative marketing

Frequently asked questions

Is Chinese rhubarb the same as the pie rhubarb in my garden?⌄

No. Pie rhubarb (Rheum rhabarbarum) is a different species; the edible stalks are not significantly laxative. Chinese rhubarb root (Rheum palmatum) is the medicinal form.

Can I take Chinese rhubarb long term for constipation?⌄

No. Like other stimulant laxatives, long-term use leads to dependence and electrolyte issues. Use short-term (under 1 week) and address underlying causes with diet, fluids, and fiber.

Track Chinese Rhubarb with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

Coming to App Store
Evidence-based·Last reviewed May 30, 2026·Evidence current as of May 30, 2026·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.