Description:
Yi Mu Cao (益母草), also known as Chinese Motherwort, is a traditional Chinese herbal medicine prepared from the dried aerial parts of Leonurus japonicus Houtt., a plant in the Lamiaceae family. It is traditionally valued for supporting menstrual health, promoting Blood circulation, and addressing Blood Stasis according to Traditional Chinese Medicine (TCM) principles.
In TCM, Yi Mu Cao is primarily associated with the Liver, Heart, and Urinary Bladder meridians. It is traditionally used in formulas for irregular menstruation, menstrual discomfort, and certain postpartum conditions. It is also traditionally used to promote urination and help relieve fluid retention.
Yi Mu Cao is particularly associated with women’s health and menstrual support. Its traditional use focuses on promoting Blood movement and supporting the body’s natural circulation processes.
Modern research has investigated its naturally occurring alkaloids, flavonoids, and other plant compounds. However, evidence from laboratory and animal studies does not establish that dried Yi Mu Cao is an effective treatment for specific medical conditions in humans.
Benefits:
- Traditionally used to support menstrual health
- Traditionally used to promote Blood circulation according to TCM principles
- Traditionally used to address Blood Stasis patterns
- Traditionally used to support regular menstrual function
- Traditionally used for menstrual discomfort
- Traditionally used in certain postpartum herbal formulas
- Traditionally used to promote urination
- Traditionally used to help relieve fluid retention
- Traditionally used to support women’s reproductive health
- Contains naturally occurring alkaloids, including leonurine and stachydrine
- Provides naturally occurring flavonoids and other phytochemicals
- Contains plant compounds investigated for antioxidant and cardiovascular-related activities
- Traditionally used as an ingredient in classical TCM herbal formulas
Other Names:
Yi Mu Cao, Yi Mu Cao (益母草), Chinese Motherwort, Oriental Motherwort, Motherwort Herb, Leonuri Herba, Leonurus japonicus Houtt., Leonurus heterophyllus Sweet, and Leonurus artemisia (Lour.) S.Y.Hu.
Persian names: دم شیر (Dam-e Shir). This name should be verified locally, as Persian herbal names can vary by region and may refer to different plants.
Indian names: गुमा (Guma), लाल हलकुचा (Lal Halkucha), and Chinese Motherwort. These names are reported for Leonurus japonicus in Indian herbal references.
Traditional Uses:
In Traditional Chinese Medicine, Yi Mu Cao is traditionally used to invigorate Blood and address Blood Stasis, particularly in patterns associated with menstrual irregularities and discomfort.
It is traditionally included in formulas for delayed or irregular menstruation, menstrual cramps, and selected postpartum conditions. It is also used to promote urination and help relieve fluid retention.
Yi Mu Cao is primarily associated with women’s health in TCM. Its traditional applications depend on the individual’s pattern, constitution, and symptoms.
Side Effects:
Yi Mu Cao may cause gastrointestinal discomfort, nausea, or allergic reactions in some individuals. Its effects on uterine activity and menstrual bleeding are important safety considerations.
Excessive amounts may increase the risk of unwanted effects, and the safety of long-term use has not been adequately established.
Discontinue use and consult a healthcare practitioner if unusual bleeding, persistent discomfort, or other unwanted symptoms occur.
Precautions:
Do not use during pregnancy. Yi Mu Cao may stimulate uterine activity and is traditionally associated with promoting menstruation.
Avoid use while breastfeeding unless directed by a qualified healthcare practitioner, as safety information is limited.
Consult a healthcare practitioner before use if you have a medical condition, a history of abnormal uterine bleeding, heavy menstrual periods, or are taking prescription medications.
Individuals planning to conceive should seek professional advice before use.
This product should be used under the guidance of a qualified Traditional Chinese Medicine practitioner, particularly for menstrual or postpartum concerns.
Interactions:
Consult a healthcare practitioner before combining Yi Mu Cao with prescription medications or other herbal products.
Anticoagulants and antiplatelet medications: Potential interactions affecting bleeding risk have not been adequately established. Seek professional guidance before combining them.
Blood pressure medications: Laboratory and preclinical research has investigated cardiovascular effects of motherwort constituents. The clinical significance of interactions remains uncertain.
Hormonal medications: Because Yi Mu Cao is traditionally used for menstrual and reproductive concerns, consult a healthcare practitioner before combining it with hormonal contraceptives or hormone therapy.
Other herbs affecting menstruation or uterine activity: Combining Yi Mu Cao with other herbs that influence menstrual bleeding or uterine activity may increase uncertainty regarding safety.
Dosing:
Use according to the product label or as directed by a qualified Traditional Chinese Medicine practitioner.
Traditional Chinese Medicine references commonly describe dried Yi Mu Cao in approximate amounts of 9–30 g for decoction use, depending on the preparation, formula, and clinical circumstances. This range is not a universal recommendation for self-treatment.
Because Yi Mu Cao may affect uterine activity and menstrual bleeding, dosing should be determined by a qualified practitioner.
For a 50 g bulk-herb product, the package quantity should not be interpreted as a recommended daily dose.
Storage:
Store in a cool, dry place away from direct sunlight. Keep tightly closed and out of reach of children.
Protect the dried herb from moisture, humidity, insects, and excessive heat. Discard if there are signs of mold, unusual odor, or spoilage.
Preparation:
Yi Mu Cao is traditionally prepared as a decoction by simmering the dried aerial parts in water according to the practitioner’s instructions.
It is frequently combined with other herbs in TCM formulas intended to support menstrual health, promote Blood circulation, or address fluid retention.
Use only herbs correctly identified as Leonurus japonicus Houtt. Different species of motherwort may have different chemical compositions and safety profiles.
Scientific Support:
Leonurus japonicus Houtt. is the principal botanical source of Yi Mu Cao in Traditional Chinese Medicine. Research has identified naturally occurring alkaloids, including leonurine and stachydrine, as well as flavonoids and other phytochemicals.
Laboratory and animal studies have investigated potential effects on uterine function, inflammation, oxidative stress, and cardiovascular activity. Researchers have also examined its traditional use in menstrual and postpartum conditions.
However, clinical evidence for dried Yi Mu Cao remains limited, and findings from isolated compounds, injections, or concentrated extracts cannot automatically be applied to a 50 g whole-herb product.
Pregnancy is an important contraindication because of the herb’s potential uterine-stimulating effects. Further high-quality human research is needed to establish appropriate dosing, effectiveness, and long-term safety.
References & Scientific Support:
PubMed – Leonurus japonicus Houtt.: Ethnopharmacology, Phytochemistry and Pharmacology of an Important Traditional Chinese Medicine. This review examines the traditional uses, chemical constituents, pharmacological activities, and toxicology of Leonurus japonicus, including its historical applications in women’s health and the need for further safety research. View Research.
PubMed – Leonurus japonicus (Chinese Motherwort), an Excellent Traditional Medicine for Obstetrical and Gynecological Diseases: A Comprehensive Overview. This review summarizes the plant’s traditional applications in menstrual and postpartum conditions, its phytochemical constituents, and research into its potential pharmacological activities. It also highlights the need for further clinical investigation. View Research.
Health Canada – Licensed Natural Health Products Database: Leonurus japonicus. This Canadian regulatory record identifies a licensed natural health product containing Leonurus japonicus and provides product-specific information, including dosage form and relevant safety information. Its directions and warnings apply to the listed product, not automatically to every dried motherwort preparation. View Health Canada Reference.
