Rhubarb
(Rheum palmatum)
Also know as Chinese rhubarb
Botanical Information
A stout Asian herb in the buckwheat family with tall spires of dense clusters of small cream flowers, and broad deeply-lobed leaves on sour-tasting long reddish green stalks.
Working with Rhubarb
Part(s) Used
Root
Herb Forms
Tincture, bulk herb.
Christopher Hobbs:
“Rhubarb has bitter, laxative, and heat-clearing properties and is used for constipation, hemorrhoids, and gastroenteritis. It is also used for eruptive skin problems caused by faulty elimination and “damp heat” in the lower intestines.
Rhubarb has a taste of BITTER and a temperature of COLD.”
Historical Uses of Rhubarb
Rhubarb (genus Rheum) has been used for centuries in traditional medicine, particularly in China, where Rheum palmatum and Rheum officinale were prized for their purgative, laxative, and anti-inflammatory properties. It was also used to treat gastrointestinal disorders, liver conditions, and as a blood purifier in traditional Asian and European herbal practices.
Modern Clinical Uses
Herbalists and naturopaths use rhubarb for:
- Digestive health: Treating constipation and mild digestive disturbances.
- Liver health: Supporting detoxification and managing non-alcoholic fatty liver disease (in combination therapies).
- Kidney health: Reducing inflammation and protecting kidney function in patients with chronic kidney disease.
- Inflammatory conditions: Its anti-inflammatory properties make it useful for reducing systemic inflammation.
Chemistry
Rhubarb contains active compounds, including:
- Anthraquinones: Such as emodin and rhein, responsible for its laxative effects.
- Tannins: With astringent properties that help manage diarrhea when used in smaller doses.
- Flavonoids: Which contribute antioxidant activity.
- Sennosides: Potent laxative compounds, similar to those in senna.
- Calcium oxalate: Found in the leaves, which are toxic and not used medicinally.
Pharmacology
- Laxative effects: Stimulation of intestinal motility and water secretion via the anthraquinones.
- Anti-inflammatory effects: Rhein inhibits pro-inflammatory cytokines and pathways.
- Antimicrobial activity: Emodin shows activity against certain bacteria and fungi.
- Hepatoprotective: Antioxidant and anti-inflammatory effects protect liver tissues.
Clinical Trials
- Constipation: Studies have confirmed rhubarb’s efficacy as a laxative due to its anthraquinone content.
- Chronic kidney disease (CKD): Clinical trials suggest rhubarb may reduce creatinine levels and slow disease progression in CKD patients.
- Liver health: Studies support its use in managing non-alcoholic fatty liver disease through its antioxidant and anti-inflammatory properties.
- Cancer research: Preliminary studies indicate that emodin and rhein may have anticancer effects, though more research is needed.
Summary
Rhubarb has a long history of use in traditional medicine and remains a valuable herbal remedy for digestive and inflammatory conditions. Its active compounds have potent pharmacological effects, but safety concerns, especially regarding the toxicity of its leaves and prolonged use, should be considered. Ongoing clinical trials continue to explore its therapeutic potential in broader contexts, including liver and kidney health and cancer treatment.
Generated by ChatGPT; edited by Christopher Hobbs
Cautions
Precautions: The leaves are toxic due to high levels of oxalates and should never be consumed.
Side effects: Long-term use or high doses of rhubarb root can cause electrolyte imbalances, dependency on laxatives, and liver or kidney toxicity.
Pregnancy and breastfeeding: Not recommended due to lack of safety data.
Interactions: Can interact with diuretics, blood thinners, and drugs processed by the liver.
Do not use this herb if you have intestinal obstruction, abdominal pain, or an inflammatory condition of the intestines. Do not use longer than 8-10 days. Use this herb with caution if you have a history of
Conditions treated with Rhubarb
Condition
Treatment Support
Application
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Dosages
Decoction
1-2 grams daily
Capsules
for constipation: 0.5–1.5 grams of powder
Powdered Extract
follow label instructions
The information given here is designed to help you make informed choices about your health. The information is drawn from numerous sources—both traditional medicine practice, from the clinical experience of many herbalists currently practicing, and supported by decades of scientific research from the author. The research most consulted includes human clinical trials that help to determine the most effective and safe herbs for various needs, the best doses, and types of preparations.
The information offered in this database is not intended as a substitute for any that may have been prescribed by your health practitioner or physician.